研究者詳細 - 笠原　成

論文 - 笠原　成

分割表示 162 件中 21 - 40 件目／全件表示 >>

Putative Hall response of the strange metal component in FeSe1−xSx 査読

M. Čulo, M. Berben, Y.-T. Hsu, J. Ayres, R. D. H. Hinlopen, S. Kasahara, Y. Matsuda, T. Shibauchi, N. E. Hussey

Physical Review Research 3 ( 2 ) 2021年4月

Bond Directional Anapole Order in a Spin-Orbit Coupled Mott Insulator Sr2(Ir1−xRhx)O4 査読

H. Murayama, K. Ishida, R. Kurihara, T. Ono, Y. Sato, Y. Kasahara, H. Watanabe, Y. Yanase, G. Cao, Y. Mizukami, T. Shibauchi, Y. Matsuda, S. Kasahara

Physical Review X 11 ( 1 ) 2021年2月

Bose-Einstein condensation superconductivity induced by disappearance of the nematic state 査読

Takahiro Hashimoto, Yuichi Ota, Akihiro Tsuzuki, Tsubaki Nagashima, Akiko Fukushima, Shigeru Kasahara, Yuji Matsuda, Kohei Matsuura, Yuta Mizukami, Takasada Shibauchi, Shik Shin, Kozo Okazaki

Science Advances 6 ( 45 ) 2020年11月

掲載種別：研究論文（学術雑誌）

The crossover from the superconductivity of the Bardeen-Cooper-Schrieffer (BCS) regime to the Bose-Einstein condensation (BEC) regime holds a key to understanding the nature of pairing and condensation of fermions. It has been mainly studied in ultracold atoms, but in solid systems, fundamentally previously unknown insights may be obtained because multiple energy bands and coexisting electronic orders strongly affect spin and orbital degrees of freedom. Here, we provide evidence for the BCS-BEC crossover in iron-based superconductors FeSe − S from laser-excited angle-resolved photoemission spectroscopy. The system enters the BEC regime with x = 0.21, where the nematic state that breaks the orbital degeneracy is fully suppressed. The substitution dependence is opposite to the expectation for single-band superconductors, which calls for a new mechanism of BCS-BEC crossover in this system. 1 x x

DOI： 10.1126/SCIADV.ABB9052

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Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx 査読

W. K. Huang, S. Hosoi, M. Čulo, S. Kasahara, Y. Sato, K. Matsuura, Y. Mizukami, M. Berben, N. E. Hussey, H. Kontani, T. Shibauchi, Y. Matsuda

Physical Review Research 2 ( 3 ) 2020年9月

In-plane electronic anisotropy resulted from ordered magnetic moment in iron-based superconductors 査読

S.-F. Wu, W.-L. Zhang, V. K. Thorsmølle, G. F. Chen, G. T. Tan, P. C. Dai, Y. G. Shi, C. Q. Jin, T. Shibauchi, S. Kasahara, Y. Matsuda, A. S. Sefat, H. Ding, P. Richard, G. Blumberg

Physical Review Research 2 ( 3 ) 2020年7月

NMR study under pressure on the iron-based superconductor FeSe1−xSx (x = 0.12 and 0.23): Relationship between nematicity and AF fluctuations 査読

T. Kuwayama, K. Matsuura, Y. Mizukami, S. Kasahara, Y. Matsuda, T. Shibauchi, Y. Uwatoko, N. Fujiwara

Modern Physics Letters B 2040048 - 2040048 2020年6月

掲載種別：研究論文（学術雑誌）出版者・発行元：World Scientific Pub Co Pte Lt

We performed [Formula: see text]-nuclear magnetic resonance measurements on [Formula: see text] ([Formula: see text] = 0.12 and 0.23). We found from the relaxation time [Formula: see text] that nematicity and antiferromagnetic fluctuations show cooperative coupling.

DOI： 10.1142/s0217984920400485

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Presence and absence of itinerant gapless excitations in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 査読

M. Yamashita, Y. Sato, T. Tominaga, Y. Kasahara, S. Kasahara, H. Cui, R. Kato, T. Shibauchi, Y. Matsuda

Physical Review B 2020年4月

Evidence for an Fulde-Ferrell-Larkin-Ovchinnikov State with Segmented Vortices in the BCS-BEC-Crossover Superconductor FeSe 査読

S. Kasahara, Y. Sato, S. Licciardello, M. Čulo, S. Arsenijević, T. Ottenbros, T. Tominaga, J. Böker, I. Eremin, T. Shibauchi, J. Wosnitza, N. E. Hussey, Y. Matsuda

Physical Review Letters 2020年3月

Effect of quenched disorder on the quantum spin liquid state of the triangular-lattice antiferromagnet 1T−TaS2 査読

H. Murayama, Y. Sato, T. Taniguchi, R. Kurihara, X. Z. Xing, W. Huang, S. Kasahara, Y. Kasahara, I. Kimchi, M. Yoshida, Y. Iwasa, Y. Mizukami, T. Shibauchi, M. Konczykowski, Y. Matsuda

Physical Review Research 2 ( 1 ) 2020年1月

Measuring magnetic field texture in correlated electron systems under extreme conditions 査読

King Yau Yip, Kin On Ho, King Yiu Yu, Yang Chen, Wei Zhang, S. Kasahara, Y. Mizukami, T. Shibauchi, Y. Matsuda, Swee K. Goh, Sen Yang

Science 366 ( 6471 ) 1355 - 1359 2019年12月

Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe<inf>2</inf>(As<inf>1−x</inf>P<inf> x</inf>)<inf>2</inf> 査読

Jonathan Pelliciari, Kenji Ishii, Yaobo Huang, Marcus Dantz, Xingye Lu, Paul Olalde-Velasco, Vladimir N. Strocov, Shigeru Kasahara, Lingyi Xing, Xiancheng Wang, Changqing Jin, Yuji Matsuda, Takasada Shibauchi, Tanmoy Das, Thorsten Schmitt

Communications Physics 2 ( 1 ) 2019年12月

掲載種別：研究論文（学術雑誌）

© 2019, The Author(s). Unconventional superconductivity arises at the border between the strong coupling regime with local magnetic moments and the weak coupling regime with itinerant electrons, and stems from the physics of criticality that dissects the two. Unveiling the nature of the quasiparticles close to quantum criticality is fundamental to understand the phase diagram of quantum materials. Here, using resonant inelastic x-ray scattering (RIXS) and Fe − K β emission spectroscopy (XES), we visualize the coexistence and evolution of local magnetic moments and collective spin excitations across the superconducting dome in isovalently-doped BaFe2(As1−xPx)2 (0.00 ≤ x ≤ 0.52 ). Collective magnetic excitations resolved by RIXS are gradually hardened, whereas XES reveals a strong suppression of the local magnetic moment upon doping. This relationship is captured by an intermediate coupling theory, explicitly accounting for the partially localized and itinerant nature of the electrons in Fe pnictides. Finally, our work identifies a local-itinerant spin fluctuations channel through which the local moments transfer spin excitations to the particle-hole (paramagnons) continuum across the superconducting dome.

DOI： 10.1038/s42005-019-0236-3

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Photoinduced possible superconducting state with long-lived disproportionate band filling in FeSe 査読

Takeshi Suzuki, Takashi Someya, Takahiro Hashimoto, Shoya Michimae, Mari Watanabe, Masami Fujisawa, Teruto Kanai, Nobuhisa Ishii, Jiro Itatani, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Kozo Okazaki, Shik Shin

Communications Physics 2 115 2019年12月

Unconventional thermal metallic state of charge-neutral fermions in an insulator 査読

Sato, Y., Xiang, Z., Kasahara, Y., Taniguchi, T., Kasahara, S., Chen, L., Asaba, T., Tinsman, C., Murayama, H., Tanaka, O., Mizukami, Y., Shibauchi, T., Iga, F., Singleton, J., Li, L., Matsuda, Y.

Nature Physics 15 ( 9 ) 954 - 959 2019年9月

Coexistence of orbital and quantum critical magnetoresistance in FeSe 1 − x S x 査読

S. Licciardello, N. Maksimovic, J. Ayres, J. Buhot, M. Čulo, B. Bryant, S. Kasahara, Y. Matsuda, T. Shibauchi, V. Nagarajan, J. G. Analytis, N. E. Hussey

Physical Review Research 1 023011 2019年9月

Universal relationship between low-energy antiferromagnetic fluctuations and superconductivity in BaFe2(As1-x Px)2 査読

Kitagawa, S., Kawamura, T., Ishida, K., Mizukami, Y., Kasahara, S., Shibauchi, T., Terashima, T., Matsuda, Y.

Physical Review B 100 ( 6 ) 2019年8月

Diagonal nematicity in the pseudogap phase of HgBa2CuO4+δ 査読

H. Murayama, Y. Sato, R. Kurihara, S. Kasahara, Y. Mizukami, Y. Kasahara, H. Uchiyama, A. Yamamoto, E.-G. Moon, J. Cai, J. Freyermuth, M. Greven, T. Shibauchi, Y. Matsuda

Nature Communications 10 ( 1 ) 3282 2019年7月

Ultrafast nematic-orbital excitation in FeSe 査読

T. Shimojima, Y. Suzuki, A. Nakamura, N. Mitsuishi, S. Kasahara, T. Shibauchi, Y. Matsuda, Y. Ishida, S. Shin, K. Ishizaka

Nature Communications 10 ( 1 ) 1946 2019年4月

Se-77-NMR Study under Pressure on 12%-S Doped FeSe 査読

Kuwayama Takanori, Matsuura Kohei, Mizukami Yuta, Kasahara Shigeru, Matsuda Yuji, Shibauchi Takasada, Uwatoko Yoshiya, Fujiwara Naoki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 88 ( 3 ) 2019年3月

Evolution of the low-temperature Fermi surface of superconducting FeSe<inf>1−x</inf>S<inf>x</inf> across a nematic phase transition 査読

Coldea, A.I., Blake, S.F., Kasahara, S., Haghighirad, A.A., Watson, M.D., Knafo, W., Choi, E.S., McCollam, A., Reiss, P., Yamashita, T., Bruma, M., Speller, S.C., Matsuda, Y., Wolf, T., Shibauchi, T., Schofield, A.J.

npj Quantum Materials 4 ( 1 ) 2 2019年1月

Pressure-induced lifshitz transition in fese<inf>0:88</inf>s<inf>0:12</inf> probed via⁷⁷se-NMR 査読

Kuwayama T, Matsuura K, Mizukami Y, Kasahara S, Matsuda Y, Shibauchi T, Uwatoko Y, Fujiwara N

Papers in Physics 11 2019年

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