Updated on 2025/07/02

写真a

 
KONDO Ryusuke
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
External link

Degree

  • Ph.D. ( The University of Tokyo )

  • a Master of Engineering ( The University of Tokyo )

Research Interests

  • 極限下(低温・強磁場・高圧縮(静水圧・一軸性))の物性測定・構造解析

  • band-filling of topological materials

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

Education

  • 東京大学大学院   総合文化研究科広域科学専攻   相関基礎科学系

    1996.4 - 1998.2

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    Country: Japan

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  • 東京大学大学院   工学系研究科   物理工学専攻

    1994.4 - 1996.3

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    Country: Japan

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  • The University of Tokyo   工学部   物理工学科

    1990.4 - 1994.3

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Research History

  • Okayama University   The Graduate School of Natural Science and Technology   Associate Professor

    2012.1

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  • The University of Tokyo   Graduate School of Arts and Sciences, Basic Science,Section of Multi-Disciplinary Sciences,   Assistant Professor

    2007.4 - 2011.12

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  • The University of Tokyo   Graduate School of Arts and Sciences, Basic Science,Section of Multi-Disciplinary Sciences,   Research Assistant

    1998.2 - 2007.3

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Professional Memberships

 

Papers

  • Structural and Superconducting Properties of Bi2Rh3(Se1–xSx)2 (x = 0–1.0) Reviewed

    Zhiyan Zhang, Wanli Pan, Masaki Utsumi, Yuki Yamamoto, Hidenori Goto, Ryusuke Kondo, Takayoshi Yokoya, Ryota Goban, Tomoki Higashikawa, Ritsuko Eguchi, Yasuhiro Takabayashi, Koichi Hayashi, Hirofumi Ishii, Tatsuo C. Kobayashi, Yoshihiro Kubozono

    Inorganic Chemistry   63 ( 45 )   21531 - 21540   2024.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.inorgchem.4c03637

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  • Control of Polar/Antipolar Layered Organic Semiconductors by the Odd‐Even Effect of Alkyl Chain Reviewed

    Satoru Inoue, Toshiki Higashino, Kiyoshi Nikaido, Ryo Miyata, Satoshi Matsuoka, Mutsuo Tanaka, Seiji Tsuzuki, Sachio Horiuchi, Ryusuke Kondo, Ryoko Sagayama, Reiji Kumai, Daiki Sekine, Takayoshi Koyanagi, Masakazu Matsubara, Tatsuo Hasegawa

    Advanced Science   11 ( 13 )   2024.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    Abstract

    Some rodlike organic molecules exhibit exceptionally high layered crystallinity when composed of a link between π‐conjugated backbone (head) and alkyl chain (tail). These molecules are aligned side‐by‐side unidirectionally to form self‐organized polar monomolecular layers, providing promising 2D materials and devices. However, their interlayer stacking arrangements have never been tunable, preventing the unidirectional arrangements of molecules in whole crystals. Here, it is demonstrated that polar/antipolar interlayer stacking can be systematically controlled by the alkyl carbon number n, when the molecules are designed to involve effectively weakened head‐to‐head affinity. They exhibit remarkable odd–even effect in the interlayer stacking: alternating head‐to‐head and tail‐to‐tail (antipolar) arrangement in odd‐n crystals, and uniform head‐to‐tail (polar) arrangement in even‐n crystals. The films show excellent field‐effect transistor characteristics presenting unique polar/antipolar dependence and considerably improved subthreshold swing in the polar films. Additionally, the polar films present enhanced second‐order nonlinear optical response along normal to the film plane. These findings are key for creating polarity‐controlled optoelectronic materials and devices.

    DOI: 10.1002/advs.202308270

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  • Pressure Dependence of the Structural and Superconducting Properties of the Bi-Based Superconductor Bi2Pd3Se2 Reviewed

    Zhiyan Zhang, Mitsuki Ikeda, Masaki Utsumi, Yuki Yamamoto, Hidenori Goto, Ritsuko Eguchi, Yen-Fa Liao, Hirofumi Ishii, Yasuhiro Takabayashi, Koichi Hayashi, Ryusuke Kondo, Tatsuo C. Kobayashi, Yoshihiro Kubozono

    Inorganic Chemistry   63 ( 5 )   2553 - 2561   2024.1

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    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.inorgchem.3c03737

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  • Temperature-induced transformation between layered herringbone polymorphs in molecular bilayer organic semiconductors Reviewed

    Shunto Arai, Satoru Inoue, Mutsuo Tanaka, Seiji Tsuzuki, Ryusuke Kondo, Reiji Kumai, Tatsuo Hasegawa

    Physical Review Materials   7 ( 2 )   2023.2

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevmaterials.7.025602

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevMaterials.7.025602/fulltext

  • Highly stable and isomorphic donor–acceptor stacking in a family of n-type organic semiconductors of BTBT–TCNQ derivatives Reviewed

    Satoshi Matsuoka, Kazuma Ogawa, Ryota Ono, Kiyoshi Nikaido, Satoru Inoue, Toshiki Higashino, Mutsuo Tanaka, Jun'ya Tsutsumi, Ryusuke Kondo, Reiji Kumai, Seiji Tsuzuki, Shunto Arai, Tatsuo Hasegawa

    Journal of Materials Chemistry C   10 ( 43 )   16471 - 16479   2022

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    Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    Unsymmetrically substituted donor–acceptor type compounds exhibit an isomorphous layered packing structure, which is discussed in terms of DFT-based quantum chemical calculations.

    DOI: 10.1039/d2tc03634g

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  • Spin Dynamics in the Mixed Stack Charge Transfer Complex, (BEDO-TTF)(Cl2TCNQ) Reviewed

    Ko-ichi Hiraki, Masashi Takahashi, Toshihiro Takahashi, Tatsuo Hasegawa, Ryusuke Kondo, Seiichi Kagoshima

    Journal of the Physical Society of Japan   89 ( 7 )   074706 - 074706   2020.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Applied Physics  

    DOI: 10.7566/jpsj.89.074706

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  • Multiple charge density waves compete in ternary rare-earth nickel carbides,RNiC2(R: Y, Dy, Ho, and Er) Reviewed

    Hiroyuki Maeda, Ryusuke Kondo, Yoshio Nogami

    PHYSICAL REVIEW B   100   104107   2019.9

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  • Possible charge order structure of stoichiometric YbFe2O4 Reviewed

    Kosuke Fujiwara, Tomoyuki Karasudani, Mamoru Fukunaga, Hiroyuki Kobayashi, Jun Kano, Pierre-Eymeric Janolin, Jean-Michel Kiat, Yoshio Nogami, Ryusuke Kondo, Naoshi Ikeda

    FERROELECTRICS   512 ( 1 )   85 - 91   2017

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/00150193.2017.1349945

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  • Interplay of Charge-Density Wave and Magnetic Order in Ternary Rare-Earth Nickel Carbides, RNiC2 (R = Pr and Nd) Reviewed

    Nobuki Yamamoto, Ryusuke Kondo, Hiroyuki Maeda, Yoshio Nogami

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   82 ( 12 )   2013.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.82.123701

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  • Reproducible synthetic method for the topological superconductor CuxBi2Se3 Reviewed

    Ryusuke Kondo, Taiki Yoshinaka, Yoshinori Imai, Atsutaka Maeda

    Journal of the Physical Society of Japan   82 ( 6 )   2013.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.82.063702

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  • Superconductivity at 5.4 K in beta-Bi2Pd Reviewed

    Yoshinori Imai, Fuyuki Nabeshima, Taiki Yoshinaka, Kosuke Miyatani, Ryusuke Kondo, Seiki Komiya, Ichiro Tsukada, Atsutaka Maeda

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   81 ( 11 )   2012.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1143/JPSJ.81.113708

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  • Ultrafast photo-induced insulator-to-metal transition in the spin density wave system of (TMTSF)(2)PF6 Reviewed

    Shinichi Watanabe, Ryusuke Kondo, Seiichi Kagoshima, Ryo Shimano

    PHYSICA B-CONDENSED MATTER   405 ( 11 )   S360 - S362   2010.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physb.2009.10.063

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  • Electronic states of organic quasi-two dimensional conductor beta ''-(DODHT)(2)PF6 center dot Charge ordering and superconductivity Reviewed

    M. Higa, R. Kondo, A. Murata, S. Kagoshima, H. Nishikawa, K. Yakushi

    PHYSICA B-CONDENSED MATTER   405 ( 11 )   S172 - S175   2010.6

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    DOI: 10.1016/j.physb.2009.11.092

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  • Interplay of charge-density waves and superconductivity in the organic conductor beta ''-(BEDT-TTF)(2)AuBr2 Reviewed

    Ryusuke Kondo, Momoka Higa, Seiichi Kagoshima, Noriaki Hanasaki, Yoshio Nogami, Hiroyuki Nishikawa

    PHYSICAL REVIEW B   81 ( 2 )   024519   2010.1

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    DOI: 10.1103/PhysRevB.81.024519

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  • Observation of ultrafast photoinduced closing and recovery of the spin-density-wave gap in (TMTSF)(2)PF6 Reviewed

    Shinichi Watanabe, Ryusuke Kondo, Seiichi Kagoshima, Ryo Shimano

    PHYSICAL REVIEW B   80 ( 22 )   2009.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.80.220408

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  • Effects of Hydrostatic Pressure and Uniaxial Strain on Spin-Peierls Transition in an Organic Radical Magnet, BBDTA center dot InCl4 Reviewed

    Masaki Mito, Seiichiro Kawagoe, Hiroyuki Deguchi, Seishi Takagi, Wataru Fujita, Kunio Awaga, Ryusuke Kondo, Seiichi Kagoshima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   78 ( 12 )   2009.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1143/JPSJ.78.124705

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  • Crystal and Electronic Structures of the Quasi-Two-Dimensional Organic Conductor alpha-(BEDT-TTF)(2)I-3 and Its Selenium Analogue alpha-(BEDT-TSeF)(2)I-3 under Hydrostatic Pressure at Room Temperature Reviewed

    Ryusuke Kondo, Seiichi Kagoshima, Naoya Tajima, Reizo Kato

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   78 ( 11 )   2009.11

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    DOI: 10.1143/JPSJ.78.114714

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  • Ultrafast terahertz probe of spin-density wave dynamics in organic conductor (TMTSF)(2)PF6 Reviewed

    S. Watanabe, R. Kondo, S. Kagoshima, R. Shimano

    2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5   2993 - +   2009

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  • Spin-density-wave gap in (TMTSF)(2)PF6 probed by reflection-type terahertz time-domain spectroscopy Reviewed

    Shinichi Watanabe, Ryusuke Kondo, Seiichi Kagoshima, Ryo Shimano

    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS   245 ( 12 )   2688 - 2691   2008.12

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    DOI: 10.1002/pssb.200879900

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  • Charge ordered insulating phases of DODHT salts with octahedral anions and a new radical salt, β″-(DODHT)2TaF6

    H Nishikawa, H Oshio, M Higa, R Kondo, S Kagoshima, A Nakao, H Sawa, S Yasuzuka, K Murata

    Journal of Physics: Conference Series   132   012023 - 012023   2008.10

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    Publishing type:Research paper (scientific journal)   Publisher:IOP Publishing  

    DOI: 10.1088/1742-6596/132/1/012023

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  • Hump like resistance anomaly in organic conductor beta ''-(BEDT-TTF)(2)CsCd(SCN)(4) Reviewed

    Ryusuke Kondo, Jun Otsuji, Seiichi Kagoshima, Yoshio Nogami

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77 ( 6 )   2008.6

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    DOI: 10.1143/JPSJ.77.063702

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  • Charge ordered metal and pressure-induced superconductivity in the two-dimensional organic conductor beta-(DODHT)(2)PF(6) Reviewed

    Akito Kobayashi, Yoshikazu Suzumura, Momoka Higa, Ryusuke Kondo, Seiichi Kagoshima, Hiroyuki Nishikawa

    JOURNAL OF PHYSICS-CONDENSED MATTER   20 ( 12 )   2008.3

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    DOI: 10.1088/0953-8984/20/12/125205

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  • Development of uniaxial elongation method and its application to low dimensional conductors Reviewed

    Hiroki Kowada, Ryusuke Kondo, Seiichi Kagoshima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   76 ( 11 )   2007.11

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    DOI: 10.1143/JPSJ.76.114710

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  • Structural studies of pressure-induced organic superconductor beta ''-(DODHT)(2)PF6 having charge-ordering phase at ambient pressure Reviewed

    Momoka Higa, Ryusuke Kondo, Seiichi Kagoshima, Hiroyuki Nshikawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   76 ( 3 )   2007.3

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    DOI: 10.1143/JPSJ.76.034709

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  • A possible internal deformation of the charge ordering and its meta-stability in the organic conductor theta-(BEDT-TTF)(2)CsZn(SCN)(4) Reviewed

    Ryusuke Kondo, Mornoka Higa, Seiichi Kagoshima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   76 ( 3 )   2007.3

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    DOI: 10.1143/JPSJ.76.033703

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  • Anisotropic superconducting transition in beta ''-(DODHT)(2)PF6 Reviewed

    Momoka Higa, Ryusuke Kondo, Seiichi Kagoshima, Hiroyuki Nishikawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   76   186 - 187   2007.1

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    DOI: 10.1143/JPSJS.76SA.186

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  • Ultrahigh-pressure effects in metallo-organics Reviewed

    Seiichi Kagoshima, Ryusuke Kondo, Nobuyuki Matsushita, Momoka Higa, Sergey V. Ovsyannikov, Nadezhda A. Shaydarova, Vladimir V. Shchennikov, Andrey Y. Manakov, Anna Y. Likhacheva

    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS   244 ( 1 )   418 - 423   2007.1

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    DOI: 10.1002/pssb.200672530

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  • High-pressure research in organic conductors Reviewed

    Keizo Murata, Seiichi Kagoshima, Syuma Yasuzuka, Harukazu Yoshino, Ryusuke Kondo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 5 )   2006.5

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  • A one-dimensional coordination polymer, BBDTA center dot InCl4: Possible spin-Peierls transition with high critical temperature of 108 K Reviewed

    Wataru Fujita, Kunio Awaga, Ryusuke Kondo, Seiichi Kagoshima

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   128 ( 18 )   6016 - 6017   2006.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ja060979+

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  • Electrical and structural properties of theta-type BEDT-TTF organic conductors under uniaxial strain Reviewed

    R Kondo, M Higa, S Kagoshima, H Hoshino, T Mori, H Mori

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 4 )   044716   2006.4

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    DOI: 10.1143/JPSJ.75.044716

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  • Superconducting and charge ordering phases of two-dimensional organic conductors Reviewed

    R. Kondo, M. Higa, S. Kagoshima

    JOURNAL OF LOW TEMPERATURE PHYSICS   142 ( 3-4 )   535 - 538   2006.2

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  • Magnetic correlation in BETS2(Cl(2)TCNQ) Reviewed

    Y. Takano, K. Hiraki, T. Takahashi, R. Kondo, S. Kagoshima, T. Hasegawa, T. Mocihda, Y. Iwasa

    JOURNAL OF LOW TEMPERATURE PHYSICS   142 ( 3-4 )   647 - 650   2006.2

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    DOI: 10.1007/s10909-006-9201-0

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  • Ultra high pressure application to organic conductors Reviewed

    S. Kagoshima, R. Kondo, N. Matsushita, S. V. Ovsyannikov, N. A. Shaidarova, V. V. Shchennikov

    JOURNAL OF LOW TEMPERATURE PHYSICS   142 ( 3-4 )   409 - 412   2006.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10909-006-9126-7

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    Other Link: http://orcid.org/0000-0003-1022-430X

  • Charge ordered insulating state in DODHT salts Reviewed

    H. Nishikawa, Y. Sato, T. Kodama, K. Kikuchi, I. Ikemoto, J. Yamada, H. Oshio, R. Kondo, S. Kagoshima

    JOURNAL OF LOW TEMPERATURE PHYSICS   142 ( 3-4 )   633 - 636   2006.2

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    DOI: 10.1007/s10909-006-9106-y

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  • Magneto-transport properties in the density wave phase of beta ''-(BEDT-TTF)(2)CsCd(SCN)(4) Reviewed

    R. Kondo, J. Otsuji, S. Kagoshima

    YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC FIELDS   51   327 - +   2006

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    DOI: 10.1088/1742-6596/51/1/076

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  • Structural and electronic properties of a new molecular conductor, alpha-(BEDT-TTF)(2)CsCd(SCN)(4) Reviewed

    R Kondo, M Higa, S Kagoshima

    SOLID STATE COMMUNICATIONS   137 ( 12 )   637 - 640   2006

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    DOI: 10.1016/j.ssc.2006.01.025

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  • Fermi surface study of organic conductors using a magnetooptical measurement under high magnetic fields Reviewed

    M. Kimata, H. Ohta, K. Koyama, M. Motokawa, R. Kondo, S. Kagoshima, H. Tanaka, M. Tokumoto, H. Kobayashi, A. Kobayashi

    YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC FIELDS   51   359 - +   2006

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    DOI: 10.1088/1742-6596/51/1/084

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  • Crystal structure analysis under uniaxial strain at low temperature using a unique design of four-axis x-ray diffractometer with a fixed sample Reviewed

    R Kondo, S Kagoshima, J Harada

    REVIEW OF SCIENTIFIC INSTRUMENTS   76 ( 9 )   093902   2005.9

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    DOI: 10.1063/1.2001607

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  • Charge ordering and pressure-induced superconductivity in beta ''-(DODHT)(2)PF6 Reviewed

    H Nishikawa, Y Sato, K Kikuchi, T Kodama, Ikemoto, I, J Yamada, H Oshio, R Kondo, S Kagoshima

    PHYSICAL REVIEW B   72 ( 5 )   052510   2005.8

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    DOI: 10.1103/PhysRevB.72.052510

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  • Molecular arrangement and electronic band structure of theta-(BEDT-TTF)(2)CsZn(SCN)(4) controlled by uniaxial compression Reviewed

    R Kondo, M Higa, S Kagoshima, H Hoshino, T Mori, H Mori

    CURRENT APPLIED PHYSICS   4 ( 5 )   484 - 487   2004.8

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    DOI: 10.1016/j.cap.2004.01.004

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  • Phase transition on (BEDO-TTF) (Cl(2)TCNQ): Spin dynamics observed by NMR measurements Reviewed

    M Takahashi, K Hiraki, T Takahashi, T Hasegawa, R Kondo, S Kagoshima

    JOURNAL DE PHYSIQUE IV   114   141 - 142   2004.4

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    DOI: 10.1051/jp4:2004114033

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  • Crystal and electronic structures of alpha-(BEDT-TTF)(2)I-3 under uniaxial strains Reviewed

    R Kondo, S Kagoshima

    JOURNAL DE PHYSIQUE IV   114   523 - 525   2004.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1051/jp4:2004114123

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  • 2k(F) transitions in a series of (DMET)(2)(X(1)X(2)TCNQ) (X(1), X(2)=Br, Cl, F, CH(3), H): Subsidiary lattice effect by anion radicals Reviewed

    T Sato, T Hasegawa, T Akutagawa, T Nakamura, R Kondo

    PHYSICAL REVIEW B   69 ( 7 )   2004.2

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    DOI: 10.1103/PhysRevB.69.075103

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  • 2kF transitions in a series of (DMET)2(X 1X2TCNQ) (X1, X2=Br, Cl, F, CH 3, H): Subsidiary lattice effect by anion radicals

    T. Sato, T. Hasegawa, T. Akutagawa, T. Nakamura, R. Kondo

    Physical Review B - Condensed Matter and Materials Physics   69 ( 7 )   751031 - 751035   2004.2

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  • Crystal structure and electronic band structure of the organic superconductor alpha-(BEDT-TTF)(2)NH4Hg(SCN)(4) under uniaxial strain Reviewed

    R Kondo, S Kagoshima, M Maesato

    PHYSICAL REVIEW B   67 ( 13 )   2003.4

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    DOI: 10.1103/PhysRevB.67.134519

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  • Crystal structure and electronic band structure of the organic superconductor α-(BEDT-TTF)2NH4HG(SCN)4 under uniaxial strain Reviewed

    Ryusuke Kondo, Seiichi Kagoshima, Mitsuhiko Maesato

    Physical Review B - Condensed Matter and Materials Physics   67 ( 13 )   1345191 - 1345196   2003.4

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  • Band structure control of organic superconductors by the uniaxial strain method Reviewed

    S. Kagoshima, R. Kondo, M. Maesato

    Synthetic Metals   137 ( 1-3 )   1163 - 1165   2003

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  • Uniaxial strain study of electronic and crystal structures of organic conductors Reviewed

    S. Kagoshima, R. Kondo, M. Chusho, M. Maesato, T. Mori, H. Mori, S. Tanaka

    Synthetic Metals   133-134   145 - 146   2003

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  • Crystal and band structures of organic superconductor under the uniaxial strain Reviewed

    R. Kondo, S. Kagoshima, M. Maesato

    Physica C: Superconductivity and its Applications   388-389   601 - 602   2003

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  • Crystal structure of organic superconductor, α-(BEDT-TTF)2NH4Hg(SCN)4, under the uniaxial strain Reviewed

    R. Kondo, S. Kagoshima, M. Maesato

    Synthetic Metals   133-134   137 - 139   2003

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  • Metal-insulator transition of donor-acceptor-type organic charge-transfer complex (BETS)2(Br2TCNQ): Site-selective NMR measurements Reviewed

    K. Hiraki, S. Furuta, T. Takahashi, R. Kondo, S. Kagoshima, T. Hasegawa, T. Mochida, Y. Iwasa

    Physical Review B - Condensed Matter and Materials Physics   66 ( 3 )   351041 - 351046   2002.7

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    DOI: 10.1103/PhysRevB.66.035104

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  • Metal-insulator transition of donor-acceptor-type organic charge-transfer complex (BETS)(2)(Br(2)TCNQ): Site-selective NMR measurements Reviewed

    K Hiraki, S Furuta, T Takahashi, R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    PHYSICAL REVIEW B   66 ( 3 )   035104-1-035104-6   2002.7

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    DOI: 10.1103/PhysRevB.66.035104

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  • Control of electronic properties of organic superconductors by uniaxial strain method Reviewed

    S. Kagoshima, R. Kondo, T. Shibata, H. Hirai, M. Maesato, H. Hoshino, T. Mori, H. Mori, S. Tanaka

    Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals   380   77 - 84   2002

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    DOI: 10.1080/10587250290101397

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  • Effects of uniaxial strain on α-(BEDT-TTF)2MHg(SCN) 4 [M=K, NH4] Reviewed

    M. Maesato, S. Kagoshima, R. Kondo, T. Shibata, H. Hirai

    Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals   376   195 - 200   2002

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    DOI: 10.1080/10587250210805

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  • Superconductivity and metal-insulator transition in twin-columnar organic superconductor, (BETS)(2)(X(2)TCNQ) [X=Cl, Br] Reviewed

    R Kondo, T Hasegawa, T Mochida, S Kagoshima, Y Iwasa, K Hiraki, T Takahashi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 10 )   3023 - 3030   2001.10

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    DOI: 10.1143/JPSJ.70.3023

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  • Control of electronic properties of alpha-(BEDT-TTF)(2)MHg(SCN)(4) (M=K,NH4) by the uniaxial strain method Reviewed

    M Maesato, Y Kaga, R Kondo, S Kagoshima

    PHYSICAL REVIEW B   64 ( 15 )   2001.10

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  • Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure Reviewed

    T Hasegawa, T Akutagawa, T Nakamura, T Mochida, R Kondo, S Kagoshima, Y Iwasa

    PHYSICAL REVIEW B   64 ( 8 )   2001.8

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  • Electronic properties of novel donor-acceptor type charge transfer complexes, (BETS)(2)(X(2)TCNQ) (X = Cl, Br): H-1, Se-77 and C-13-NMR Reviewed

    K Hiraki, T Takahashi, R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    SYNTHETIC METALS   120 ( 1-3 )   917 - 918   2001.3

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    DOI: 10.1016/S0379-6779(00)01048-1

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  • Metal-insulator transition in donor-acceptor type superconductor, (BETS)(2)(X(2)TCNQ) Reviewed

    R Kondo, T Hasegawa, S Kagoshima, T Mochida, Y Iwasa

    SYNTHETIC METALS   120 ( 1-3 )   995 - 996   2001.3

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    DOI: 10.1016/S0379-6779(00)00915-2

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  • Electronic states of novel donor/acceptor type of organic superconductor, (BETS)(2)(Cl(2)TCNQ) Reviewed

    K Hiraki, T Takahashi, R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS   62 ( 1-2 )   401 - 403   2001.1

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  • Novel electronic states of organic conductors under uniaxial stress or uniaxial strain Reviewed

    S. Kagoshima, M. Maesato, Y. Kaga, R. Kondo

    Synthetic Metals   117 ( 1-3 )   87 - 90   2001

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  • Donor-acceptor-type complexes of (BEDT-TTF)(TCNQ) analogues: Peculiar magnetic transition in (BEDO-TTF)(Cl2TCNQ) Reviewed

    T. Hasegawa, R Kondo, S. Kagoshima, Y. Iwasa, T. Mochida, T. Akutagawa, T. Nakamura

    Synthetic Metals   120   991 - 992   2001

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  • Control of electronic properties of (formula presented) (formula presented) by the uniaxial strain method Reviewed

    M. Maesato, Y. Kaga, R. Kondo, S. Kagoshima

    Physical Review B - Condensed Matter and Materials Physics   64 ( 15 )   2001

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    DOI: 10.1103/PhysRevB.64.155104

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  • Control of electronic properties of α-(BEDT-TTF)2MHg(SCN)4 (M = K, NH4) by the uniaxial strain method Reviewed

    M. Maesato, Y. Kaga, R. Kondo, S. Kagoshima

    Physical Review B - Condensed Matter and Materials Physics   64 ( 15 )   1551041 - 1551048   2001

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    DOI: 10.1103/PhysRevB.64.155104

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  • Artificial control of intermolecular distance of organic superconductors: α -type BEDT-TTF compounds Reviewed

    S. Kagoshima, T. Shibata, H. Hirai, R. Kondo, M. Maesato

    Current Applied Physics   1 ( 1 )   72 - 76   2001

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  • Electronic and crystal structures of organic superconductors under the uniaxial strain Reviewed

    S. Kagoshima, R. Kondo, M. Maesato

    Current Applied Physics   1 ( 4-5 )   307 - 311   2001

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  • Uniaxial strain study of organic conductors (TMTSF)2PF6 Reviewed

    H. Hirai, R. Kondo, M. Maesato, T. Shibata, S. Kagoshima

    Synthetic Metals   120 ( 1-3 )   963 - 964   2001

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  • Uniaxial strain study of organic conductors α-(BEDT-TTF)2MHg(SCN)4 [M=K, NH4] Reviewed

    M. Maesato, Y. Kaga, R. Kondo, H. Hirai, S. Kagoshima

    Synthetic Metals   120 ( 1-3 )   941 - 942   2001

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  • Control of electronic properties of organic conductors by uniaxial strain method Reviewed

    S. Kagoshima, M. Maesato, R. Kondo, T. Shibata, H. Hirai

    Synthetic Metals   120 ( 1-3 )   683 - 686   2001

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  • Control of electronic properties of organic conductors by hydrostatic and uniaxial compression Reviewed

    S. Kagoshima, R. Kondo, H. Hirai, T. Shibata, Y. Kaga, M. Maesato

    Physica Status Solidi (B) Basic Research   223 ( 1 )   97 - 104   2001

  • Electronic states in the spin-density wave phase of organic conductors: Roles of the coexisting 2kF and 4kF charge-density waves Reviewed

    S. Kagoshima, Y. Saso, M. Maesato, R. Kondo, T. Yamaguchi, V.A. Bondarenko, T. Hasegawa

    Synthetic Metals   117 ( 1-3 )   39 - 43   2001

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  • Mixed-stack organic charge-transfer complexes with intercolumnar networks Reviewed

    T Hasegawa, T Mochida, R Kondo, S Kagoshima, Y Iwasa, T Akutagawa, T Nakamura, G Saito

    PHYSICAL REVIEW B   62 ( 15 )   10059 - 10066   2000.10

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  • Uniaxial strain method for soft crystals: Application to the control of the electronic properties of organic conductors

    M Maesato, Y Kaga, R Kondo, S Kagoshima

    REVIEW OF SCIENTIFIC INSTRUMENTS   71 ( 1 )   176 - 181   2000.1

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    DOI: 10.1063/1.1150180

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  • Mixed-stack organic charge-transfer complexes with intercolumnar networks Reviewed

    HASEGAWA T, MOCHIDA T, KONDO R, KAGOSHIMA S, IWASA Y, AKUTAGAWA T, NAKAMURA T, SAITO G

    Physical Review B   62 ( 15 )   10059 - 10066   2000

  • Semiclassical and non-classical angular effects of magnetoresistance in (TMTSF)2X Reviewed

    Toshihito Osada, Toshihito Osada, Nobuharu Kami, Nobuharu Kami, Ryusuke Kondo, Seiichi Kagoshima

    Synthetic Metals   103   2024 - 2027   1999.6

  • Organic metals involving double chain donor arrangements, (BMDT-TTF)(2)((RR2)-R-1-TCNQ) [R-1 = H, Me, R-2 = Cl, Br] Reviewed

    T Mochida, T Hasegawa, R Kondo, S Kagoshima, Y Iwasa

    SYNTHETIC METALS   102 ( 1-3 )   1680 - 1680   1999.6

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  • Electronic phase transition of BEDT-TTF based mixed-stack charge-transfer complexes Reviewed

    T Hasegawa, T Akutagawa, T Nakamura, Y Sasou, R Kondo, S Kagoshima, T Mochida, G Saito, Y Iwasa

    SYNTHETIC METALS   103 ( 1-3 )   1804 - 1805   1999.6

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  • Structure and properties of (BEDSe-TTF)(Fn-TCNQ) charge transfer complexes (n=1, 2, 4) Reviewed

    T Mochida, H Moriyama, T Hasegawa, R Kondo, S Kagoshima, Y Iwasa

    SYNTHETIC METALS   102 ( 1-3 )   1678 - 1679   1999.6

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    DOI: 10.1016/S0379-6779(98)00578-5

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  • Structure and properties of ail organic conductor (BEDT-TseF)(2)(X(1)X(2)TCNQ) (X-1,X-2=Cl,Br) Reviewed

    R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    SYNTHETIC METALS   102 ( 1-3 )   1628 - 1629   1999.6

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    DOI: 10.1016/S0379-6779(98)00492-5

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  • Donor-acceptor type superconductor, (BETS)(2)(Cl(2)TCNQ) Reviewed

    R Kondo, T Hasegawa, T Mochida, S Kagoshima, Y Iwasa

    CHEMISTRY LETTERS   1999 ( 4 )   333 - 334   1999.4

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    DOI: 10.1246/cl.1999.333

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  • Low-temperature diffuse X-ray studies of charge-density waves coexisting with spin-density waves in the organic conductors (TMTSF)2PF6 and (TMTSF)2AsF6 Reviewed

    S. Kagoshima, Y. Saso, M. Maesato, R. Kondo, T. Hasegawa

    Solid State Communications   110 ( 9 )   479 - 483   1999

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  • Electrical properties of Zn-Mg-RE (RE=Y, Gd) icosahedral quasicrystals Reviewed

    R Kondo, T Hashimoto, K Edagawa, S Takeuchi, T Takeuchi, U Mizutani

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   66 ( 4 )   1097 - 1102   1997.4

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    DOI: 10.1143/JPSJ.66.1097

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MISC

Presentations

  • 角度分解光電子分光によるノーダルライン半金属LaTe1+xBi1-xのバンド分散

    齋藤竜聖, 片岡範行, 脇田高徳, 景山晴加, 近藤隆祐, 野上由夫, 田中清尚, 横谷尚睦

    日本物理学会 春季大会 

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    Event date: 2023.3.22 - 2023.3.25

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  • Polymorphic transformation triggered by the rearrangement of alkyl-side chains in molecular bilayer-type organic semiconductors

    Arai Shunto, Tanaka Mutsuo, Inoue Satoru, Kondo Ryusuke, Kumai Reiji, Hasegawa Tatsuo

    JSAP Annual Meetings Extended Abstracts  2021.2.26  The Japan Society of Applied Physics

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    Event date: 2021.2.26

    Language:Japanese  

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  • Layered Crystallinity and Semiconductor Property of Asymmetrically Substituted BTBT Derivatives Having Phenylethynyl Groups

    Inoue Satoru, Toshiki Higashino, Shunto Arai, Mutsuo Tanaka, Ryusuke Kondo, Ryoko Sagayama, Reiji Kumai, Tatsuo Hasegawa

    JSAP Annual Meetings Extended Abstracts  2019.9.4  The Japan Society of Applied Physics

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    Event date: 2019.9.4

    Language:Japanese  

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  • アルカリ超酸化物NaO2の低温構造

    宮島瑞樹, 福田崇人, Fahmi Astuti, 近藤隆祐, 野上由夫, 中野岳仁, 渡邊功雄, 神戸高志, 小谷柾史

    日本物理学会 秋季大会(物性) 

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    Event date: 2018.9.9 - 2018.9.12

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  • トポロジカル半金属YPdxPt1-xBiの作成と電気物性

    近藤隆祐, 石井宏樹, 野上由夫

    日本物理学会 第73回年次大会 

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    Event date: 2018.3.22 - 2018.3.25

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  • 低温強磁場X線カメラの開発と希土類化合物RNiC2系への適用

    近藤隆祐, 阿井幸男, 野上由夫

    日本物理学会 秋季大会 

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    Event date: 2016.9.13 - 2016.9.16

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  • 希土類化合物RNiC2(R=La, Ce)のホール効果2

    野村勝史, 近藤隆祐, 野上由夫

    日本物理学会第70回年次大会 

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    Event date: 2015.3.21 - 2015.3.24

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  • 7pBJ-4 Hall effect of rare-earth compounds RNiC_2(R=Sm,Nd)

    Nomura K., Kondo R., Nogami Y.

    Meeting abstracts of the Physical Society of Japan  2014.8.22  The Physical Society of Japan (JPS)

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    Event date: 2014.8.22

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  • 27aCJ-7 Structural phase transition in RNiC_2(R=Y,Ho,Er)

    Kondo Ryusuke, Maeda Hiroyuki, Nomura Katsufumi, Nogami Yoshio

    Meeting abstracts of the Physical Society of Japan  2014.3.5  The Physical Society of Japan (JPS)

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    Event date: 2014.3.5

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  • 微弱信号検出における実験室とKEK-PFとのコラボ:有機結晶における放射線損傷の克服

    野上由夫, 近藤隆祐, 中尾朗子, 小林賢介, 熊井玲児, 山崎裕一, 中尾裕則

    物構研サイエンスフェスタ要旨集  2014 

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  • 27pXN-5 Crystal structure of (TMTTF)_2Br at low temperture

    Toda Atsuki, Kondo Ryusuke, Nogami Yoshio, Nakao Akiko, Kumai Reiji

    Meeting abstracts of the Physical Society of Japan  2013.3.26  The Physical Society of Japan (JPS)

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    Event date: 2013.3.26

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  • 26aXZE-10 Single crystal preparation and property of RNiC_2

    Maeda H., Yamamoto N., Kondo R., Nogami Y.

    Meeting abstracts of the Physical Society of Japan  2013.3.26  The Physical Society of Japan (JPS)

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    Event date: 2013.3.26

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  • (TMTTF)2Brの電荷不均一と(TMTSF)2PF6のSDW/CDW共存

    戸田敦基, 近藤隆祐, 野上由夫, 中尾朗子, 熊井玲児

    物構研サイエンスフェスタ要旨集  2013 

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  • 21aEA-2 Synthesis of the superconductor Cu_xBi_2Se_3 and trial to introduce other kind of atoms instead of Cu one

    Kondo R., Yoshinaka T., Imai Y., Maeda A.

    Meeting abstracts of the Physical Society of Japan  2012.8.24  The Physical Society of Japan (JPS)

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    Event date: 2012.8.24

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  • 24pBK-2 Symmetry Change in κ-(BEDT-TTF)_2Cu_2(CN)_3 at LT.

    Yamamoto N., Nogami Y., Kondo R., Terasaki I., Sasaki T., Maesato M., Hanasaki N., Nakao A.

    Meeting abstracts of the Physical Society of Japan  2012.3.5  The Physical Society of Japan (JPS)

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    Event date: 2012.3.5

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  • 26pBK-2 Modulation Wavevector for θ-(BEDT-TTF)2CsZn(SCN)4 under Uniaxial Strain

    Nogami Y., Tanimoto Y., Kondo R., Hanasaki N.

    Meeting abstracts of the Physical Society of Japan  2012.3.5  The Physical Society of Japan (JPS)

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  • 27aBK-4 Precursory CDW fluctuation observed above SDW transition temperature for (TMTSF)_2PF_6

    Toda A., Nogami Y., Yamamoto N., Kondo R., Hanasaki N.

    Meeting abstracts of the Physical Society of Japan  2012.3.5  The Physical Society of Japan (JPS)

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    Event date: 2012.3.5

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  • 27aYC-10 Charge Density Wave and Magneto Resistance for DyNiC_2 and CeNiC_2

    Maeda H., Yamamoto N., Nogami Y., Kondo R., Hanasaki N., Shimomura S.

    Meeting abstracts of the Physical Society of Japan  2012.3.5  The Physical Society of Japan (JPS)

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  • β“-(DODHT)2AsF6の電荷秩序絶縁体転移

    新崎洋一, 西川浩之, 近藤隆祐, 中尾朗子, 熊井玲児, 野上由夫

    分子科学討論会講演プログラム&要旨(Web)  2012 

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  • Pd-Bi-Se単結晶の超伝導特性

    今井良宗, 鍋島冬樹, 吉中泰輝, 宮谷昂佑, 近藤隆祐, 小宮世紀, 塚田一郎, 前田京剛

    応用物理学会学術講演会講演予稿集(CD-ROM)  2012 

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    Event date: 2012

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  • Pd-Bi-Se単結晶の超伝導特性

    今井良宗, 鍋島冬樹, 吉中泰輝, 宮谷昂佑, 近藤隆祐, 小宮世紀, 塚田一郎, 前田京剛

    日本物理学会講演概要集  2012 

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  • 24aTC-3 Magneto-transport property of Compensated Topological Insulator Bi_2Se_3

    Yoshinaka T., Kondo R., Imai Y., Maeda A.

    Meeting abstracts of the Physical Society of Japan  2011.8.24  The Physical Society of Japan (JPS)

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    Event date: 2011.8.24

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  • Laboratory guide: Control of electronic phases in organic conductors by the application or the uniaxial strain method Invited

    Solid state physics  2011.5 

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    Event date: 2011.5

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  • 26pTB-2 Observation of Charge Density wave and Charge Ordering in (TMTCF)_2X by X-ray and SR 1.

    Nogami Y., Toda A., Kondo R., Hanasaki N., Kambe T., Nakao A.

    Meeting abstracts of the Physical Society of Japan  2011.3.3  The Physical Society of Japan (JPS)

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    Event date: 2011.3.3

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  • 25aTA-4 Structural study of θ-(BEDT-TTP)_2CsZn(SCN)_4 under uniaxial strain

    Kondo R, Kagoshima S, Kumai R, Nakao A, Tanimoto Y, Nogami Y, Sawa H

    Meeting abstracts of the Physical Society of Japan  2011.3.3  The Physical Society of Japan (JPS)

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    Event date: 2011.3.3

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  • 26aHG-13 Magneto-transport property of Compensated Topological Insulator Bi_2Se_3

    Yoshinaka T., Kondo R., Imai Y., Maeda A.

    Meeting abstracts of the Physical Society of Japan  2011.3.3  The Physical Society of Japan (JPS)

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    Event date: 2011.3.3

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  • 26aHG-14 Electrical transport property in substituted or intercalated Toporogical Insulator Bi_2Se_3

    Kondo R., Yoshinaka T., Imai Y., Maeda A.

    Meeting abstracts of the Physical Society of Japan  2011.3.3  The Physical Society of Japan (JPS)

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    Event date: 2011.3.3

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  • 一軸柱圧縮下θ‐(BEDT‐TTF)2CsZn(SCN)4の構造変調

    近藤隆祐, 鹿児島誠一, 熊井玲児, 中尾朗子, 谷本由衣, 野上由夫, 澤博

    日本物理学会講演概要集  2011.3.3 

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    Event date: 2011.3.3

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  • (TMTCF)2XのCDW/COのX線放射光観察 1

    野上由夫, 戸田敦基, 近藤隆祐, 花咲徳亮, 神戸高志, 中尾朗子

    日本物理学会講演概要集  2011 

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  • スピンパイエルス物質における静水圧力・一軸性圧縮効果と自在な物性制御 Invited

    美藤正樹, 出口博之, 藤田 渉, 近藤隆祐, 鹿児島誠一

    固体物理  2010.7 

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    Event date: 2010.7

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  • 23aPS-48 Quasi-particle injection effects induced by intense terahertz pulse in the SDW phase of (TMTSF)_2PF_6

    Tsubota S., Watanabe S., Kondo R., Kagoshima S., Shimano R.

    Meeting abstracts of the Physical Society of Japan  2010.3.1  The Physical Society of Japan (JPS)

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    Event date: 2010.3.1

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  • 21pGT-11 ^<13>C-NMR study on α-(BEDT-TTF)_2CsCd(SCN)_4

    Takahashi R., Hiraki K., Takahashi T., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2010.3.1  The Physical Society of Japan (JPS)

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    Event date: 2010.3.1

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  • 20aGT-10 The AC conductivity of θ-type organic conductors under uniaxial strain

    KONDO Ryusuke, Kaogshima S.

    Meeting abstracts of the Physical Society of Japan  2010.3.1  The Physical Society of Japan (JPS)

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    Event date: 2010.3.1

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  • 23pRB-12 Charge ordering and superconductivity in β"-(DODHT)_2PF_6

    Kondo Ryusuke, Kagoshima S, Yamamoto K, Yakushi K, Nishikawa H

    Meeting Abstracts of the Physical Society of Japan  2010  The Physical Society of Japan

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    Event date: 2010

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  • 25aYC-8 ^<13>C-NMR study on α-(BEDT-TTF)_2CsCd(SCN)_4

    Takahashi R., Hiraki K., Takahashi T., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2009.8.18  The Physical Society of Japan (JPS)

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    Event date: 2009.8.18

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  • 25aXA-9 Ultrafast photo-induced closing and recovery of spin-density-wave gap in (TMTSF)_2PF_6

    Watanabe S., Kondo R., Kagoshima S., Shimano R.

    Meeting abstracts of the Physical Society of Japan  2009.8.18  The Physical Society of Japan (JPS)

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    Event date: 2009.8.18

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  • 25aXA-10 Conductivity change induced by intense terahertz pulse excitation in the SDW phase of (TMTSF)_2PF_6

    Tsubota S., Watanabe S., Kondo R., Kagoshima S., Shimano R.

    Meeting abstracts of the Physical Society of Japan  2009.8.18  The Physical Society of Japan (JPS)

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    Event date: 2009.8.18

    Language:Japanese  

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  • 25aYC-10 Electronic Properties of β"-(DODHT)_2PF_6 in the Charge Fluctuating Phase (II)

    Kondo Ryusuke, Higa M., Murata A., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2009.8.18  The Physical Society of Japan (JPS)

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    Event date: 2009.8.18

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  • 29pYF-5 Electrical and Structure properties of α-(BEDT-TTF)_2CsCd(SCN)_4

    KONDO Ryusuke, Higa Momoka, Kagoshima Seiichi, Nakao Akiko, Sawa Hiroshi

    Meeting abstracts of the Physical Society of Japan  2009.3.3  The Physical Society of Japan (JPS)

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    Event date: 2009.3.3

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  • 28pVD-2 Dynamics of photo-induced melting of spin-density-wave states in (TMTSF)_2PF_6

    Watanabe S., Kondo R., Kagoshima S., Shimano R.

    Meeting abstracts of the Physical Society of Japan  2009.3.3  The Physical Society of Japan (JPS)

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    Event date: 2009.3.3

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  • 30aYF-4 Electronic Property of β"-(DODHT)_2PF_6 in the Charge Fluctuating Phase

    Higa M., Murata A., Kondo R., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2009.3.3  The Physical Society of Japan (JPS)

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    Event date: 2009.3.3

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  • α-(BEDT-TTF)2CsCd(SCN)4の構造物性

    近藤隆祐, 比嘉百夏, 鹿児島誠一, 中尾朗子, 澤博

    日本物理学会講演概要集  2009 

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    Event date: 2009

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  • 22pTC-4 AC conductivity measurement of β"-(DODHT)_2X

    Higa M., Murata A., Kondo R., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2008.8.25  The Physical Society of Japan (JPS)

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    Event date: 2008.8.25

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  • 22pTC-3 The electronic structure of β"-(BEDT-TTF)_2AuBr_2 under uniaxial strain

    Kondo Ryusuke, Higa Momoka, Kagoshima Seiichi

    Meeting abstracts of the Physical Society of Japan  2008.8.25  The Physical Society of Japan (JPS)

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    Event date: 2008.8.25

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  • 22aTC-8 Crystal Structure analyses of α-(BEDT-TTF)_2I_3 and α-(BEDT-TSeF)_2I_3 under pressure

    KONDO Ryusuke, Kagoshima Seiichi, Tajima Naoya, Kato Reizo

    Meeting abstracts of the Physical Society of Japan  2008.8.25  The Physical Society of Japan (JPS)

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    Event date: 2008.8.25

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  • 26aWB-5 Satellite reflection measurement of β"-(BEDT-TTF)_2AuBr_2

    Kakinuma M., Hanasaki N., Nogami Y., Kondo R., Kagoshina S.

    Meeting abstracts of the Physical Society of Japan  2008.2.29  The Physical Society of Japan (JPS)

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    Event date: 2008.2.29

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  • 24aYH-5 Observation of the spin density wave gap in (TMTSF)_2PF_6 by terahertz time domain spectroscopy

    Watanabe S., Shimano R., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2008.2.29  The Physical Society of Japan (JPS)

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    Event date: 2008.2.29

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  • 26aWB-4 Electrical properties of b"-(BEDT-TTF)_2AuBr_2

    Kondo R., Kagoshima S., Kakinuma M., Hanasaki N., Nogami Y.

    Meeting abstracts of the Physical Society of Japan  2008.2.29  The Physical Society of Japan (JPS)

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    Event date: 2008.2.29

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  • α-(BEDT-TTF)_2I_3の静水圧力下構造解析(京都大学基礎物理学研究所共同利用研究会「分子性ゼロギャップ物質の新物性」,研究会報告)

    近藤 隆祐, 比嘉 百夏, 鹿児島 誠一

    物性研究  2008  物性研究刊行会

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    Event date: 2008

    Language:Japanese  

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    Other Link: http://hdl.handle.net/2433/142598

  • β′′-DODHT塩の電荷秩序絶縁相

    西川浩之, 大塩寛紀, 比嘉百夏, 近藤隆祐, 鹿児島誠一, 中尾朗子, 澤博

    分子科学討論会講演プログラム&要旨(Web)  2008 

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  • 21aRA-3 Anisotropic superconductivity in β"-(DODHT)2_PF_6

    Higa M., Kondo R., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2007.8.21  The Physical Society of Japan (JPS)

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    Event date: 2007.8.21

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  • 22aTK-6 Terahertz time domain reflection spectroscopy measurement of (TMTSF)_2PF_6

    Watanabe S., Shimano R., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2007.8.21  The Physical Society of Japan (JPS)

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    Event date: 2007.8.21

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  • 21pRA-3 Development of the uniaxial strain method and its application to 2D organic conductors

    Kondo Ryusuke

    Meeting abstracts of the Physical Society of Japan  2007.8.21  The Physical Society of Japan (JPS)

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    Event date: 2007.8.21

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  • 21pRA-6 Non-linior transport of β" and θ type salts under pressure

    Higa M., Kondo R., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2007.2.28  The Physical Society of Japan (JPS)

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    Event date: 2007.2.28

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  • 19pRJ-16 Fabrication of a Superconductor Junction Composed of Organic Superconductors

    Kowada H., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2007.2.28  The Physical Society of Japan (JPS)

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    Event date: 2007.2.28

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  • 21aRA-5 STM/STS on θ and α-(BEDT-TTF)_2X

    Ikeda S., Ichimura K., Nomura K., Ishioka J., Tanda S., Kondo R., Higa M., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2007.2.28  The Physical Society of Japan (JPS)

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    Event date: 2007.2.28

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  • 圧力誘起超伝導体DODHT塩における構造と物性の対アニオン依存性

    西川浩之, 大塩寛紀, 比嘉百夏, 近藤隆祐, 鹿児島誠一, 安塚周磨, ARUMUGAM Sonachalam, 村田恵三, 中尾朗子, 澤博

    分子科学討論会講演要旨集(CD-ROM)  2007 

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    Event date: 2007

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  • 26aYB-6 Preparing the superconductor-superconductor junction composed of two organic superconductor κ-(BEDT-TTF)_2Cu(NCS)_2 crystals

    Kowada H., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2006.8.18  The Physical Society of Japan (JPS)

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    Event date: 2006.8.18

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  • 25pYF-5 Nonlinear conduction under uni-axial strain of α-(BEDT-TTF)_2CsCd(SCN)_4

    Higa M., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2006.8.18  The Physical Society of Japan (JPS)

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    Event date: 2006.8.18

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  • 25pYF-16 Crystal structure of β"-(DODHT)_2AsF_6 at low temperature

    Higa M., Kondo R., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2006.8.18  The Physical Society of Japan (JPS)

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    Event date: 2006.8.18

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  • 25pYF-17 Charge Ordering and Pressure-Induced Superconductivity in β"-DODHT Salt

    Kobayashi Akito, Suzumura Yoshikazu, Higa Momoka, Kondo Ryusuke, Kagoshima Seiichi, Nishikawa Hiroyuki

    Meeting abstracts of the Physical Society of Japan  2006.8.18  The Physical Society of Japan (JPS)

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  • 25aZB-9 Development of uniaxial extensile stress method II : an application to quasi-one-dimensional conductor NbSe_3

    Kowada H., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2006.8.18  The Physical Society of Japan (JPS)

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    Event date: 2006.8.18

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  • 23aYB-3 Magnetoresistance of B"-(BEDT-TTF)_2CsCd(SCN)_4 under in plane magnetic field

    Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2006.8.18  The Physical Society of Japan (JPS)

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  • 28aRB-4 Crystal structure analyses of α-(BEDT-TTF)_2CsCd(SCN)_4 under uniaxial strain

    Kondo R., Higa M., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2006.3.4  The Physical Society of Japan (JPS)

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    Event date: 2006.3.4

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  • 27aRB-2 Ultra high pressure application to organic conductors

    Kagoshima Seiichi, Kondo Ryusuke, Matsushita Nobuyuki, Higa Momoka, Ovsyannikov Sergey V., Shaidarova Nadezhda A., Shchennikov Vladimir V.

    Meeting abstracts of the Physical Society of Japan  2006.3.4  The Physical Society of Japan (JPS)

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    Event date: 2006.3.4

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  • 30pRB-3 Crystal structure of β"-(DODHT)_2PF_6 under hydrostatic pressure

    Higa M., Kondo R., Kagoshima S., Nishikawa H.

    Meeting abstracts of the Physical Society of Japan  2006.3.4  The Physical Society of Japan (JPS)

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    Event date: 2006.3.4

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  • 27aRB-1 Development of uniaxial tensile stress method

    Kowada H., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2006.3.4  The Physical Society of Japan (JPS)

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    Event date: 2006.3.4

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  • 21pWB-10 ^<77>Se NMR measurements under pressure on(BETS)_2(Cl_2TCNQ)

    Takano Y., Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  2005.8.19  The Physical Society of Japan (JPS)

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    Event date: 2005.8.19

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  • 19pWB-2 Low Temperature Fermi Surface of β"-(BEDT-TTF)_2CsCd(SCN)_4

    Kimata M., Ohta H., Koyama K., Motokawa M., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2005.8.19  The Physical Society of Japan (JPS)

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    Event date: 2005.8.19

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  • 26pYL-8 Electronic property of α-(BEDT-TTF)_2CsCd(SCN)_4 under uniaxial strain

    Higa M., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2005.3.4  The Physical Society of Japan (JPS)

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    Event date: 2005.3.4

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  • 27pYL-7 Phase transition on (BEDO-TTF)(Cl_2TCNQ) : Spin dynamics observed by NMR measurements iv

    Takahashi M., Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan  2005.3.4  The Physical Society of Japan (JPS)

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    Event date: 2005.3.4

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  • 26pYL-9 Low-Temperature electronic properties of β"-(BEDT-TTF)_2CsCd(SCN)_4

    Otsuji J, Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2005.3.4  The Physical Society of Japan (JPS)

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    Event date: 2005.3.4

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  • 27aYL-11Charge ordering in pressure-induced superconductor, β"-(DODHT)_2PF_6

    Nishikawa H., Sato Y., Kikuchi K., Kodama T., Ikemoto I., Yamada J., Oshio H., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2005.3.4  The Physical Society of Japan (JPS)

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  • Control of electronic properties of molecular conductors by uniaxial strain

    S Kagoshima, R Kondo

    CHEMICAL REVIEWS  2004.11 

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    Event date: 2004.11

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  • 13aWH-7 Phase transition on (BEDO-TTF) (Cl_2TCNQ) : Spin dynamics observed by NMR measurements III

    Takahashi M., Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan  2004.8.25  The Physical Society of Japan (JPS)

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    Event date: 2004.8.25

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  • 13aWH-6 Full structure analyses of molecular single crystal at low-temperatures under high-pressures below 1.5GPa III

    Takahashi Y., Kumai R., Hasegawa T., Horiuchi S., Tokura Y., Kondo R., Kagoshima S., Sawa H.

    Meeting abstracts of the Physical Society of Japan  2004.8.25  The Physical Society of Japan (JPS)

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    Event date: 2004.8.25

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  • 13pWE-6 The effect of uniaxial strain on β"-(BEDT-TTF)_2SF_5CH_2CF_2SO_3

    Maesato M., Saito G., Schlueter J. A., Mohtasham J., Gard G. L., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2004.8.25  The Physical Society of Japan (JPS)

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  • Crystal structure analysis of neutral-ionic transition system single crystals under low-temperatures and/or under high-pressures

    KUMAI REIJI, HORIUCHI SACHIO, TAKAHASHI YUKIHIRO, HASEGAWA TATSUO, TOKURA YOSHINORI, KONDO RYUSUKE, KAGOSHIMA SEIICHI, SAWA HIROSHI

    日本化学会講演予稿集  2004.3.11 

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    Event date: 2004.3.11

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  • 28pWG-6 Full structure analysis of molecular single crystal under low-temperatures and under high-pressures below 1.5GPa

    Kumai Reiji, Takahashi Yukihiro, Hasegawa Tatsuo, Horiuchi Sachio, Tokura Yoshinori, Kondo Ryusuke, Kagoshima Seiichi, Sawa Hiroshi

    Meeting abstracts of the Physical Society of Japan  2004.3.3  The Physical Society of Japan (JPS)

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    Event date: 2004.3.3

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  • 28pWG-11 Phase transition on (BEDO-TTF)(Cl_2TCNQ) : Spin dynamics observed by NMR measurements

    Takahashi M., Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan  2004.3.3  The Physical Society of Japan (JPS)

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    Event date: 2004.3.3

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  • 27pWL-1 Crystal Structure and electronic properties of α-(BEDT-TTF)_2CsCd(SCN)_4

    Kondo R., Higa M., Otsuji J., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2004.3.3  The Physical Society of Japan (JPS)

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    Event date: 2004.3.3

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  • Phase transition on (BEDO-TTF)(Cl_2TCNQ) : Spin dynamics observed by NMR measurements

    Hiraki K., Takahashi T., Hasegawa T., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2003.3.6  The Physical Society of Japan (JPS)

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    Event date: 2003.3.6

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  • Crystal Structure Analysis under the Uniaxial Stress : α-(BEDT-TTF)_2I_3

    Kondo R, Kagoshima S

    Meeting abstracts of the Physical Society of Japan  2003.3.6  The Physical Society of Japan (JPS)

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    Event date: 2003.3.6

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  • Uniaxial Strain Effect on the $\theta$-Phase Organic Conductor with a Large Dihedral Angle, $\theta$-(TMET-TTP)4PF6

    Takeuchi Tomoaki, Hoshino Hirotada, Kondo Ryusuke, Kagoshima Seiichi, Enomoto Masaya, Kawamoto Tadashi, Mori Takehiko

    J Phys Soc Jpn  2003  The Physical Society of Japan (JPS)

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    Event date: 2003

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    For the organic conductor $\theta$-(TMET-TTP)4PF6 (TMET-TTP: 2-[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-5-(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene), electrical resistance has been measured under the uniaxial strain applied along the $a$-, $b$-, and $c$-axes as well as under hydrostatic pressure. Contrary to the prediction of the universal phase diagram in which the $c$-axis strain will raise the metal–insulator transition temperature by expanding the dihedral angle, the insulating state is suppressed under the strain in all directions. The results are interpreted in terms of the increasing intra-stack transfer integral in the large dihedral angle region.

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00208627900?from=CiNii

  • Metal-insulator transition of donor-acceptor-type organic charge-transfer complex (BETS)(2)(Br(2)TCNQ): Site-selective NMR measurements

    K Hiraki, S Furuta, T Takahashi, R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    PHYSICAL REVIEW B  2002.7 

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    Event date: 2002.7

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  • 24aXM-4 Crystal Structure Analysis under the Uniaxial Stress: a -(ET)_2NH_4Hg(SCN)_4

    Kondo R., Kagoshinsa S., Maesato M.

    Meeting abstracts of the Physical Society of Japan  2002.3.1  The Physical Society of Japan (JPS)

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    Event date: 2002.3.1

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  • 25pXM-2 NMR study on (BETS)_2(X_2TCNQ) (X=Br,Cl) V

    Furuta S., Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  2002.3.1  The Physical Society of Japan (JPS)

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    Event date: 2002.3.1

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  • Structural Control of Organic Conductors by Uniaxial Strain: θ- and α-Phases of BEDT-TTF Compounds

    R. Kondo, S. Kagoshima, M. Chusho, H. Hoshino, T. Mori, H. Mori, S. Tanaka

    Current Appl. Phys.  2002 

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    Event date: 2002

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  • NMR study on (BETS)_2(X_2TCNQ)(X=Br, Cl)IV

    Furuta S., Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  2001.9.3  The Physical Society of Japan (JPS)

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    Event date: 2001.9.3

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  • Photo-induced effect in the CDW phase of K_<0.3>MoO_3

    Ogawa N., Kondo R., Murakami Y., Miyano K.

    Meeting abstracts of the Physical Society of Japan  2001.9.3  The Physical Society of Japan (JPS)

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    Event date: 2001.9.3

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  • Neutral-ionic phase transition of (BEDT-TTF)(ClMeTCNQ) under pressure

    T. Hasegawa, T. Akutagawa, T. Nakamura, T. Mochida, R. Kondo, S. Kagoshima, Y. Iwasa

    Physical Review B - Condensed Matter and Materials Physics  2001.8.15 

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    Event date: 2001.8.15

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  • NMR study of (BETS)_2(X_2TCNQ) III

    Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  2001.3.9  The Physical Society of Japan (JPS)

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    Event date: 2001.3.9

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  • Liquid-Vapor-Like Spin-Lattice Phase Transition in (BEDO-TTF)(Cl_2TCNQ)

    Hasegawa T., Akutagawa T., Nakamura T., Naito T., Inabe T., Mochida T., Kondo R., Kagoshima S., Iwasa Y., Saito G.

    Meeting abstracts of the Physical Society of Japan  2001.3.9  The Physical Society of Japan (JPS)

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    Event date: 2001.3.9

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  • Effects of the chemical and physical pressures on organic superconductors

    Kondo Ryusuke

    Meeting abstracts of the Physical Society of Japan  2001.3.9  The Physical Society of Japan (JPS)

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    Event date: 2001.3.9

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  • Crystal Structure Analysis under the Uniaxial Compression : α-(ET)_2NH_4Hg(SCN)_4

    Hirai H., Suma K., Kondo R., Kagoshima S., Mitsuhiko M.

    Meeting abstracts of the Physical Society of Japan  2001.3.9  The Physical Society of Japan (JPS)

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    Event date: 2001.3.9

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  • Control of Electronic Properties of α-(BEDT・TTF)_2KHg(SeCN)_4 by Uniaxial Strain

    Shibata T., Kondo R., Kagoshima S., Maesato M.

    Meeting abstracts of the Physical Society of Japan  2001.3.9  The Physical Society of Japan (JPS)

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    Event date: 2001.3.9

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  • Electronic Properties under Uni-axial Compression : θ-(BO)_2Cl(H_2O)_x

    Kondo R., Chyusyo M., Kagoshima S., Hoshino H., Mori T.

    Meeting abstracts of the Physical Society of Japan  2001.3.9  The Physical Society of Japan (JPS)

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    Event date: 2001.3.9

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  • Electronic properties of novel donor-acceptor type charge transfer complexes, (BETS)(2)(X(2)TCNQ) (X = Cl, Br): H-1, Se-77 and C-13-NMR

    K Hiraki, T Takahashi, R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    SYNTHETIC METALS  2001.3 

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    Event date: 2001.3

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  • Metal-insulator transition in donor-acceptor type superconductor, (BETS)(2)(X(2)TCNQ)

    R Kondo, T Hasegawa, S Kagoshima, T Mochida, Y Iwasa

    SYNTHETIC METALS  2001.3 

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    Event date: 2001.3

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  • Electro Paramagnetic Resonance of (BEDT-TTF)(ClMeTCNQ) under high pressure

    Hasegawa T., Akutagawa T., Nakamura T., Kondo R., Iwasa Y., Sienkiewicz A., Forro L.

    Meeting abstracts of the Physical Society of Japan  2000.9.10  The Physical Society of Japan (JPS)

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    Event date: 2000.9.10

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  • Electric Properties by Uniaxial Compression of θ-ET_2CsZn(SCN)_4

    Hoshino H., Kondo R., Kagoshima S., Mori T., Mori H., Tanaka S.

    Meeting abstracts of the Physical Society of Japan  2000.9.10  The Physical Society of Japan (JPS)

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    Event date: 2000.9.10

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  • Photo-induced effect in charge-density-wave conductor K_<0.3>MoO_3

    Ogawa N., Shiraga A., Kondo R., Kagoshima S., Satoh T., Miyano K.

    Meeting abstracts of the Physical Society of Japan  2000.9.10  The Physical Society of Japan (JPS)

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    Event date: 2000.9.10

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  • ドナー・アクセプター型有機超伝導体 (BETS)2(Cl2TCNQ) Invited

    近藤隆祐, 鹿児島誠一, 長谷川達生

    固体物理  2000.5  アグネ技術センタ-

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    Event date: 2000.5

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  • Control of Electronic Properties by Uniaxial Compression : Anomalous metallic phase and Superconductivity of α-(BEDT-TTF)_2MHg(SCN)_4[M=K,NH_4] III

    Maesato M., Kaga Y., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2000.3.10  The Physical Society of Japan (JPS)

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    Event date: 2000.3.10

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  • The Electronic Properties of (TMTSF)_2PF_6 under the Uniaxial Compression

    Shibata T., Maesato M., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  2000.3.10  The Physical Society of Japan (JPS)

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    Event date: 2000.3.10

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  • NMR study on (BETS)_2(X_2TCNQ)(X=Cl,Br) II

    Hiraki K., Takahashi T., Kondo R., Kagoshima S., Hasegawa T., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  2000.3.10  The Physical Society of Japan (JPS)

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    Event date: 2000.3.10

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  • Mixed-stack organic charge-transfer complexes with intercolumnar networks

    HASEGAWA T, MOCHIDA T, KONDO R, KAGOSHIMA S, IWASA Y, AKUTAGAWA T, NAKAMURA T, SAITO G

    Physical Review B  2000 

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  • Uniaxial Strain Method for the Control of Materials Properties

    KAGOSHIMA Seiichi, MAESATO Mitsuhiko, KAGA Yasuyuki, KONDO Ryusuke

    1999.12.5  The Physical Society of Japan (JPS)

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    Event date: 1999.12.5

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  • 25ae / 25aE-5 Control of Electronic Properties by Uniaxial Compression II :(Anomalous metallic phase and Supercobdyctivity of α-(BEDT-TTF)_2Mg(SCN)_4 [M=K, NH_4] II)

    Maesato M, Kaga Y, Kondo R, Kagoshima S

    Meeting abstracts of the Physical Society of Japan  1999.9.3  The Physical Society of Japan (JPS)

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    Event date: 1999.9.3

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  • 25pE-12 Anomaly of Dielectric Constant in (BEDT-TTF)(ClMeTCNQ) at Neutral-Ionic Phase Transtion under high pressure

    Hasegawa T, Akutagawa T, Nakamura T, Kondo R, Kagoshima S, Mochida T, Iwasa Y

    Meeting abstracts of the Physical Society of Japan  1999.9.3  The Physical Society of Japan (JPS)

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    Event date: 1999.9.3

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  • 25pE-13 ^1H-NMR Study of (BETS)_2(X_2TCNQ)(X=Cl, Br)

    Hiraki K, Takahashi T, Kondo R, Kagoshima S, Hasegawa T, Mochida T, Iwasa Y

    Meeting abstracts of the Physical Society of Japan  1999.9.3  The Physical Society of Japan (JPS)

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    Event date: 1999.9.3

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  • 25aE-3 Contorol of Electronic Properties by Uniaxial Compression I : α-(BEDT=TTF)_2I_3

    Kaga Y, Maesato M, Kondo R, Kagoshima S

    Meeting abstracts of the Physical Society of Japan  1999.9.3  The Physical Society of Japan (JPS)

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    Event date: 1999.9.3

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  • Structure and properties of ail organic conductor (BEDT-TseF)(2)(X(1)X(2)TCNQ) (X-1,X-2=Cl,Br)

    R Kondo, S Kagoshima, T Hasegawa, T Mochida, Y Iwasa

    SYNTHETIC METALS  1999.6 

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    Event date: 1999.6

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  • Structure and properties of (BEDSe-TTF)(Fn-TCNQ) charge transfer complexes (n=1, 2, 4)

    T Mochida, H Moriyama, T Hasegawa, R Kondo, S Kagoshima, Y Iwasa

    SYNTHETIC METALS  1999.6 

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    Event date: 1999.6

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  • 31a-XB-11 Superconductivity and Metal-Insulator Transition of(BETS)_2X_2TCNQ(X=Br, Cl)

    Kondo R., Kuroki Y., Kagoshima S., Hasegawa T., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  1999.3.15  The Physical Society of Japan (JPS)

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    Event date: 1999.3.15

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  • 31a-XB-8 Phase Diagram of(BEDT-TTF)(ClMeTCNQ)at high pressure

    Hasegawa T., Akutagawa T., Nakamura T., Kondo R., Kagoshima S., Mochida T., Iwasa Y.

    Meeting abstracts of the Physical Society of Japan  1999.3.15  The Physical Society of Japan (JPS)

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    Event date: 1999.3.15

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  • 29p-XB-12 Control of Electronic Properties by Uniaxial Compression III : Anomalous metallic phase and Superconductivity of α-(BEDT-TTF)-_MHg(SCN)_4[M=K, NH-4]

    Maesato M., Kaga Y., Kondo R., Kagoshima S.

    Meeting abstracts of the Physical Society of Japan  1999.3.15  The Physical Society of Japan (JPS)

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    Event date: 1999.3.15

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  • 28p-XB-1 X-ray studies of charge-density waves around 4K : ((TMTSF)_2X and α-(BEDT-TTF)_2KHg(SCN)_4

    Saso Y., Kagoshima S., Maesato M., Kondo R.

    Meeting abstracts of the Physical Society of Japan  1999.3.15  The Physical Society of Japan (JPS)

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    Event date: 1999.3.15

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  • 29p-XB-10 Control of Electronic Properties by Uniaxial Compression : Purposes and Methods

    Kagoshima S., Kaga Y., Maesato M., Kondo R.

    Meeting abstracts of the Physical Society of Japan  1999.3.15  The Physical Society of Japan (JPS)

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    Event date: 1999.3.15

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  • Neutral-lonic Phase Transition in BEDT-TTF-based Mixed Stack Charge-Transfer Complexes

    HASEGAWA T., AKUTAGAWA T., NAKAMURA T., KONDO R., KAGOSHIMA S., MOCHIDA T., IWASA Y.

    Meeting abstracts of the Physical Society of Japan  1998.9.5  The Physical Society of Japan (JPS)

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    Event date: 1998.9.5

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  • Metal phase of BETS-X_1X_2TCNQ(X_1,X_2=Br,Cl)in low temperature range

    KONDO R., KAGOSHIMA S., HASEGAWA T., MOCHIDA T., IWASA Y.

    Meeting abstracts of the Physical Society of Japan  1998.9.5  The Physical Society of Japan (JPS)

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    Event date: 1998.9.5

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  • Develpoment and properties of BEDT-TseF based two-component charge-transfer Compounds

    KONDO R., KAGOSHIMA S., HASEGAWA T., MOCHIDA T., IWASA Y.

    Meeting abstracts of the Physical Society of Japan  1998.3.10  The Physical Society of Japan (JPS)

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    Event date: 1998.3.10

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  • Electronic Phase Transition in BEDT-TTF-based Mixed Stack Charge-Transfer Complexes

    HASEGAWA T., SASOU Y., KONDO R., KAGOSHIMA S., MOCHIDA T., IWASA Y., SAITO G.

    Meeting abstracts of the Physical Society of Japan  1998.3.10  The Physical Society of Japan (JPS)

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    Event date: 1998.3.10

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  • Electrical Conductivity of Mg-Zn-Rare Earth Icosahedral Quasicrystals

    Kondo R., Hashimoto T., Edagawa K., Takeuchi S.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting  1995.9.12  The Physical Society of Japan (JPS)

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    Event date: 1995.9.12

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  • The study of icosahedral quasicrystal AlCuFe by positron annihilation

    Hamada E., Sato K., Kondo R., Nakata M., Kanazawa I., Takeuchi S.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting  1995.9.12  The Physical Society of Japan (JPS)

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    Event date: 1995.9.12

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  • The study for vacancy-type defects in F・Ktype quasicrystal by positron annihilation

    Sato K., Hamada E., Kondo R., Nakata M., Kanazawa I., Takeuchi S.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting  1995.9.12  The Physical Society of Japan (JPS)

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    Event date: 1995.9.12

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  • Electrical conductivity of Mg-Zn-Y icosahedral quasicrystal

    Kondo R., Honda Y., Hashimoto T., Edagawa K., Takeuchi S.

    Abstracts of the meeting of the Physical Society of Japan. Annual meeting  1995.3.16  The Physical Society of Japan (JPS)

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    Event date: 1995.3.16

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Research Projects

  • Quantum properties of true topological semimetal of single-crystal RTeSb with precise symmetric decision and carrier control.

    Grant number:22K03528  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    野上 由夫, 近藤 隆祐

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    Grant amount:\4290000 ( Direct expense: \3300000 、 Indirect expense:\990000 )

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  • Band-filling control of topological semimetals having a 2D square lattice structure

    Grant number:21K03472  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    近藤 隆祐

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    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    本研究の目的は,ZrSiS構造をもつトポロジカル半金属物質群を対象として,バンド交差点に対してフェルミ準位を制御した試料を作製し測定することにより,当該物質のディラック電子の伝導特性を明らかにすることである.初年度は,主にランタノイド元素を含む LaTeSb 系及び LaTeBi 系の試料作成を行い,主に,Teが多いLaTeSb系で発現する電荷密度波(CDW)の波数より,当初の目論見の通り,連続的なバンドフィリング制御が出来ることを明らかにした.この結果を踏まえて,今年度は,①ランタノイド元素を非磁性のLaからCe, Pr, Ndといった磁性元素に拡張する,② 電荷密度波が報告されていないZrSiS系との比較を行うため,ZrSnTe系のバンドフィリング制御手法の確立を目指す,を行った.この系は,ランタノイドと化学的性質が似ているとされるイットリウム(Y)を含んだ YSbTe系のYとSbを周期律表において,それぞれ,右と左に一つ移動した系に相当しているため,特にこれを選択している.
    ①については,Ln=Ce, Pr, Ndを用いて,LnTe_1+xSb(Bi)_1-x:-0.2≦x≦0.2の試料を作成し,作成全域で単結晶を得ることが出来た.Ln=Laにおいては,xを変化させていくと,CDWを伴った正四角格子から正四角格子に歪が生じた2層構造に変化することを見出していたが,それよりも原子半径の小さいこれらの元素では,CDWを伴った正四角格子相と2層構造相の間に,CDWのない正四格子相が現れること,また,原子半径が小さくなるにつれて,その領域が広がることを見出した.
    ②については,仕込み組成を変化させるに従って,電気抵抗の振る舞いが連続的に変化する試料は得られたが,CDW等の構造的な観点からの変化は見い出せず,また,格子定数の変化もLnTeSb系に比べると非常に小さいことが分かった.

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  • Study of CDW in RNiC2

    Grant number:26400362  2014.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Ryusuke Kondo, NOGAMI Yoshio

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    Grant amount:\4810000 ( Direct expense: \3700000 、 Indirect expense:\1110000 )

    Interplay between 4f-localized spins on Lanthanide atoms and Charge-density-waves on conducting bands is investigated in the rare earth intermetallic compound, RNiC2 system. The conduction bands are constructed of d-orbital of Lanthanide atoms and Nickel atoms and p-orbital of Carbon atoms. For this purpose, we have developed a Guinier-type x-ray monochromatic Laue Camera down to 3 K of the lowest temperature and up to 10 T of the highest magnetic field. Employing this camera, we have clarified relationships between the magnetic order of 4f-localized spin and the CDWs on the conduction bands in the field-induced structural phase transition of (Nd, Dy)NiC2.
    In addition to that, origin of the commensurate phase of YNiC2 has been revealed performing a single crystalline structure analysis method.

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  • Correlation physical property, charge-density-wave and superconductivity in Rare-earth compound crystals which has no inversion symmetry.

    Grant number:24540374  2012.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NOGAMI Yoshio, KONDO Ryusuke

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    Grant amount:\5070000 ( Direct expense: \3900000 、 Indirect expense:\1170000 )

    It was known that SmNiC2 whose crystal structure has no inversion symmetry shows Charge-Density-Wave(CDW) breaking with cooling at Curie Temperature. Interested in this phenomenon, we made single crystals with good quality for many kinds of RNiC2 (R=La, Ce, Pr, Nd, Sm, Gd, Dy, Y, Ho, Er), and measured physical and structural properties. We found two kinds of modulated structures whose wave vector are incommensurate ( 0.5 0.52, 0) and commensurate (0.5 0.5 0.5). Both superstructure were stabilized by lattice parameter shrinkage i. e, the formation temperature of CDW increases with the atomic number. Between Pr and Gd, there is only incommensurate superstructure with resistivity upturn(CDW) and the CDW was destroyed by the external field for at least R=Nd, Sm, Gd. For Dy and Y the competition among two superstructure was observed around room temperature. R=Ho and Er compounds show only the commensurate superlattice above room temperature.

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  • Exploration of new functionalities and fablication of composite films of ferroelectric organic conductors polarized by crystallization of correlated electrons

    Grant number:23550170  2011.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YAMAMOTO Kaoru, KONDO Ryusuke

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    Grant amount:\5070000 ( Direct expense: \3900000 、 Indirect expense:\1170000 )

    Ferroelecrics polarized by electronic polarization draw attentions of researchers. We have claimed that an organic conductor α-(BEDT-TTF)2I3 and its relatives are the matters exemplifying the idea of the novel class of ferroelectrics. In the present research, we performed dielectric constant measurements of α'-(BEDT-TTF)2IBr2 for radio frequency, and pyroelectric current measurement in α'-(BEDT-TTF)2I3 using an ac method by modulating sample temperature.

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  • Novel dynamics of quantum condensate investigated by local micorwave complex conductivity measurement

    Grant number:23244070  2011.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    MAEDA Atsutaka, KATO Yusuke, IMAI Yoshinori, HANAGURI Tetsuo, KONDO Ryusuke, FUKATSU Susumu, YASUTAKE Yusuke, TAKAHASHI Hideyuki

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    Grant amount:\47970000 ( Direct expense: \36900000 、 Indirect expense:\11070000 )

    It is important for modern scanning microwave microscope to overcome an influence of the surface roughness. Here we report microwave imaging of phase-separated iron chalcogenide KxFeySe2 (x = 0.8, y = 1.6 - 2) using scanning tunneling/microwave microscope developed by ourselves, distinguishing electric contrast from topography-induced contrast using STM/SMM. We successfully observed the characteristic modulation of local electric property originating from mesoscopic phase separation of the metallic and the semiconducting phase in two different scanning modes; constant current mode and constant Q mode. In particular, the constant Q scanning is turned to be extremely useful because we can get an qualitative image in which topographic contrast is largely eliminated without degradation of the spatial resolution. This technique, with a further improvement, should introduce novel aspect for condensed matter physics reseraches.

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  • Development of tunneling spectroscopy on Dirac electron system

    Grant number:23740255  2011 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KONDO Ryusuke

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    Grant amount:\4550000 ( Direct expense: \3500000 、 Indirect expense:\1050000 )

    In order to investigate features of Dirac electron system realized both in the organic conductor, α-(BEDT-TTF)2I3, under pressure and on the surface of the topological insulator, Bi2Se3, tunneling spectroscopy techniques under magnetic fields are developed. As the results, the synthetic methods for high-quality samples of carrier-compensated Bi2Se3, and a strong candidate for a topological superconductor, Cu-intercalated Bi2Se3, and problems of tunneling spectroscopy on the above materials by the point-contact method are revealed.

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  • Interplay of Charge ordered state and superconductivity in organic conductors

    Grant number:21740244  2008 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KONDO Ryusuke

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    Grant amount:\4550000 ( Direct expense: \3500000 、 Indirect expense:\1050000 )

    To investigate the interplay of charge ordered insulating state and superconductivity (Metallic phase), electronic and structural properties of α-, θ-, and β"-type organic conductors were studied under hydrostatic pressure and uniaxial strain. We found two cases ; I) a metallic phase having strong charge fluctuation located neighboring the charge ordered insulating phase (COI), and II) a charge ordered metallic state existed between COI and the metallic phase.

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  • 一軸性延伸法の開発とその有機導体研究への適用

    Grant number:18740193  2006 - 2007

    日本学術振興会  科学研究費助成事業  若手研究(B)

    近藤 隆祐

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    Grant amount:\3400000 ( Direct expense: \3400000 )

    試料の形状に囚われずに、有機導体のような柔らかい結晶に一軸的な延伸を印加するための方法の開発及び有機物に対する適用を行った。昨年度の研究により提案した方法で試料に延伸を印加することが可能なことが判明したため、今年度は昨年度に得られた結果の外部公表(論文投稿)、延伸印加下における構造解析実験の開発及び適用物質の拡充を重点的に遂行した。
    I)延伸印加下における構造解析実験
    低温X線構造解析装置に取り付け可能な構造解析可能な一軸延伸ホルダーの製作を行った。試料に対する見込み角は150度ほど取ることが出来た。昨年度の予備測定において物性変化が見出されたTMTSF系の試料に対して、一軸延伸下における構造解析を試みた。延伸印加前はブラッグスポットが観測されていたのにもかかわらず、延伸下においてはこれが消えることが判明した。これは試料中に乱れが生じていると考えられ、この系において、構造と物性の関係を調べることが難しいことが示唆された。
    II)適用物質の拡充
    他の有望な物質系としてβ"型分子配列を持つ有機導体を選択した。実験を遂行する前に、基底状態が不明だったβ"-(BEDT-TTF)2CsCd(SCN)4のそれを調べた結果、電荷密度相であることを明らかにした。延伸実験は現在遂行中である。
    最後に、本研究で作成した低温における延伸を印加する試料ホルダーを使用して、"有機超伝導体を用いた超伝導接合の作成"の実験を遂行したことを付記しておく。

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  • 高圧縮された有機導体の構造と電子状態

    Grant number:15073205  2003 - 2008

    日本学術振興会  科学研究費助成事業  特定領域研究

    鹿児島 誠一, 松下 信之, 近藤 隆祐

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    Grant amount:\33800000 ( Direct expense: \33800000 )

    この研究の目的は, 有機導体を一軸性圧縮と静水圧によって高度に圧縮し, 常圧とはまったく違う新構造と電子状態を実現してそこに現れる新規電子状態を探索するとともに, 有機導体の超伝導などの電子状態の制御と設計を試みることである。バンドが1/4だけ詰まり電荷秩序の自由度を持つ2次元性の物質について, 金属性, 超伝導, 電荷秩序の相互関係を系統的に調べた。
    θ-(BEDT-TTF)_2CsZn(SCN)_4, β"-(DODHT)_2PF_6, およびβ"-(BEDT-TTF)_2CsCd(SCN)_4が共通の性質を持つことを明らかにし, 電荷秩序相と金属・超伝導相の安定領域を解明するとともに, それらの中間に, 電荷揺らぎ相とでも呼ぶべき中間状態があることを発見した。中間相において非線形電気伝導を詳しく調べ, 非線形伝導にともなってメモリ効果があること, および, メモリ効果は電荷秩序と関係して結晶構造のわずかな歪を伴うというモデルを提唱した。今後に残された課題は, 中間相の電子状態の本質を解明することである。α-(BEDT-TTF)_2I_3においては, 伝導面内でひとつの方向に一軸性圧縮を加えると2次元電子ポケットのサイズが極めて小さくなることを発見し, その状態での結晶構造を明らかにした。A5班の鈴村らの理論研究により, この状態は質量のない2次元ディラック電子状態であることが発見された。これは電子物性研究における大きな発見であり, 1軸性圧縮によって初めて可能になったものである。
    このほか一軸性延伸技法を開発し, また, ロシアのグループとの共同によって4種類の有機導体を20GPaの超高圧まで圧縮し, 常温で2端子電気抵抗, 熱電能および圧縮率の測定に成功した。

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  • CONTROL OF ELECTRONIC STATES OF ORGANIC SUPERCONDUCTORS BY UNIAXIAL STRAIN METHOD

    Grant number:14204033  2002 - 2004

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    KAGOSHIMA Seiichi, KONDO Ryusuke, MAESATO Mitsuhiko, IMAKUBO Tatsuro

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    Grant amount:\54730000 ( Direct expense: \42100000 、 Indirect expense:\12630000 )

    This research aims to reveal the relationship among superconductivity and various types of electronic state of organic superconductors by uniaxially compressing crystalline lattices only along the desired direction and controlling their crystal and electronic structures.
    In a series of organic conductors having a quarter-filled conduction band with the strong Coulomb correlation, the relationship among the metallic, charge-ordered, and superconducting states were clarified by systematic investigations of electrical transport properties, crystal and electronic structures under the uniaxial strain. We found that the band structure predominated the electronic state of α-(BEDT-TTF)_2XHg(SCN)_4, (X=K,NH_4). In θ-(BEDT-TTF)_2CsZn(SCN)_4,the newly synthesized α-(BEDT-TTF)_2CsCd(SCN)_4 and β-(BEDT-TTF)_2CsCd(SCN)_4,and β''-(DODHT)_2PF_6 synthesized by the Tokyo Metropolitan University group, however, their electronic states were found to be dominated by the charge ordering due to the long range Coulomb correlation. These results lead to a unified phase diagram of the electronic states of α-,θ-and β-types of organic conductor, In the half-filled band system, K-(BEDT-TTF)_2X [X=Cu(NCS)_2,Cu[N(CN)_2]Br,Cu_2(CN)_3] the on-site Coulomb correlation causes the Mott insulating state. We found that the deformation of their triangular lattice by the uniaxial compression controlled the electronic states and the spin-firustrating state to realize an increase in the superconducting critical temperature and a nonmagnetic spin state. These results suggested the importance of the spin fluctuations for the mechanism of superconductivity.
    In the development of new materials, we turned our attention to the intermolecular interaction of the iodine bonding and the hydrogen bonding of CH・・・O type to make the supramolecular structure that gives rise to new supramolecular conducting and superconducting materials. We developed a safe method to synthesize [1,3] diselenole derivative that served as a basic reagent for new materials syntheses and succeeded in synthesizing TTF derivatives having selenium. We developed also a series of crystals of supramolecular organic conductors that had effective arrangements of anisotropic molecular interactions based on the iodine bonding. We succeeded in synthesizing BEDO-TSeF, the last unexplored molecule belonging to the family of BEDT-TTF derivative and clarifying its basic structural and electronic basic properties.

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  • Novel Electronic States in the Soft Lattice of Organic Conductors from the Control to the Design of Electronic States

    Grant number:10102004  1998 - 2001

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Specially Promoted Research

    KAGOSHIMA Seiichi, KONDO Ryusuke

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    Grant amount:\144500000 ( Direct expense: \137000000 、 Indirect expense:\7500000 )

    Organic conductors are soft and suffer changes in crystal structure of not only the molecular position but also the molecular orientation. The purpose of this study is to reveal the relationship between changes in crystal structure and electronic properties of organic conductors at low temperature under structural controls by "uniaxial compression". This leads to a control and a design of organic compounds, which have a rich variety in structure and electronic properties.
    We succeeded to develop the experimental method of uniaxial compression for transport and low-temperature x-ray diffraction measurements. Using this method, we measured electrical resistance, magnetoresistance and low temperature crystal structure of quasi two-dimensional conductors α-(BEDT-TTF)_2XHg(SCN)_4 where X=K and X=NH_4. In relation to superconductivity, we found an increase in the superconducting critical temperature from 1.5K of ambient pressure to 6K under the uniaixial compression parallel to the c-axis. The electronic structure derived by x-ray structure analyses was found to be semi-quantitatively consistent with theoretical expectation for the critical temperature by BCS theory. This result remonstrated the feasibility of the uniaxial compression method for the first time. We discovered also a novel magnetoresistance phenomenon in studies at hydrostatic pressures and named it "small closed-orbit effect".
    We measured also uniaxial strain effects in related materials like the β- and θ-type BEDT-TTF series and BO series of organic conductors. Changes in electronic properties were found to occur as expected. However, we discovered some novel phenomena to be investigated in future studies. We tried also a material design using organic acceptors to succeed in synthesizing original organic superconductor (BETS)_2(Cl_2TCNQ). This is the first organic superconductor composed of only organic molecules.
    The uniaxial strain method developed in this research is expected to be useful in controlling Coulomb correlation between electrons and to be applied also to magnetic and optical measurements.

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