Interplay between spin-orbit interaction and electron correlation --- analysis based on the first-principles calculations
Project/Area Number |
24540369
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | Ritsumeikan University (2014) Kyoto University (2012-2013) |
Principal Investigator |
IKEDA Hiroaki 立命館大学, 理工学部, 教授 (90311737)
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Co-Investigator(Kenkyū-buntansha) |
ARITA Ryotaro 独立行政法人, 理化学研究所・創発物性科学研究センター, チームリーダー (80332592)
SUZUKI Michi-To 独立行政法人, 理化学研究所・創発物性科学研究センター, 研究員 (10596547)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
Keywords | 重い電子系超伝導 / 隠れた秩序 / 第一原理計算 / 多極子秩序 |
Outline of Final Research Achievements |
In the iron-based superconductors and heavy-electron systems, orbital degrees of freedom can play an important role on the appearance of curious magnetic/multipole ordering and non-BCS superconductivity. However, the complicated band structure, which involves rich physical information, has prevented us from understanding the electronic states so far. Recently, we have succeeded in constructing a low-energy effective Hamiltonian including the spin-orbit interactions. In the model Hamiltonian, we have successfully computed orbital-resolved band structure, Fermi surfaces, and magnetic/multipole susceptibilities. This method is applicable to various materials, and is very useful for understanding the physical properties. Based on this first-principles approach, we found crucial clues to several long-standing mysteries in heavy-electron systems, for instance, the hidden order in URu2Si2 and the first-discovered unconventional superconductivity in CeCu2Si2 and so on.
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Report
(4 results)
Research Products
(37 results)
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[Journal Article] Direct Observation of Lattice Symmetry Breaking at the Hidden-Order Transition in URu2Si22014
Author(s)
S. Tonegawa, S. Kasahara, T. Fukuda, K. Sugimoto, N. Yasuda, Y. Tsuruhara, D. Watanabe, Y. Mizukami, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi,
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Journal Title
Nat. Commun.
Volume: 5
Issue: 1
Pages: 4188-4188
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe2014
Author(s)
T. Shimojima, Y. Suzuki, T. Sonobe, A. Nakamura, M. Sakano, J. Omachi, K. Yoshioka, M. Kuwata-Gonokami, K. Ono, H. Kumigashira, A. E. Böhmer, F. Hardy, T. Wolf, C. Meingast, H. v. Löhneysen, H. Ikeda, K. Ishizaka
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Journal Title
Physical Review B
Volume: 90
Issue: 12
Pages: 121111-121111
DOI
Related Report
Peer Reviewed
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[Journal Article] Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements2014
Author(s)
Taichi Terashima, Naoki Kikugawa, Andhika Kiswandhi, Eun-Sang Choi, James S. Brooks, Shigeru Kasahara, Tatsuya Watashige, Hiroaki Ikeda, Takasada Shibauchi, Yuji Matsuda, Thomas Wolf, Anna E. Bohmer, Frederic Hardy, Christoph Meingast, Hilbert v. Lohneysen, Michi-To Suzuki, Ryotaro Arita, Shinya Uji
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Journal Title
Physical Review B
Volume: 90
Issue: 14
Pages: 144517-144517
DOI
Related Report
Peer Reviewed
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[Journal Article] Field-Induced Superconducting Phase of FeSe in the BCS-BEC Crossover2014
Author(s)
S. Kasahara, T. Watashige, T. Hanaguri, Y. Kohsaka, T. Yamashita, Y. Shimoyama, Y. Mizukami, R. Endo, H. Ikeda, K. Aoyama, T. Terashima, S. Uji, T. Wolf, H. v. Loehneysen, T. Shibauchi, Y. Matsuda
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Journal Title
Proceedings of the National Academy of Sciences of the United States of America
Volume: 111
Issue: 46
Pages: 16309-16313
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Cyclotron Resonance Study of Quasiparticle Mass and Scattering Rate in the Hidden-Order and Superconducting Phases of URu2Si22013
Author(s)
S. Tonegawa, K. Hashimoto, K. Ikada, Y. Tsuruhara, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi
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Journal Title
Phys. Rev. B
Volume: 88
Issue: 24
Pages: 245131-245131
DOI
Related Report
Peer Reviewed
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