Quantum orders caused by symmetry and correlation
| Project/Area Number |
17H02922
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kyoto University |
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Principal Investigator |
Sato Masatoshi 京都大学, 基礎物理学研究所, 教授 (30313117)
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| Co-Investigator(Kenkyū-buntansha) |
小林 伸吾 国立研究開発法人理化学研究所, 創発物性科学研究センター, 研究員 (40779675)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2018: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2017: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Keywords | トポロジカル相 / マヨラナ励起 / 物性物理 / 物性理論 |
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| Outline of Final Research Achievements |
Applying the mathematics of the K-theory to materials, we have constructed a general framework of topological crystalline insulators and superconductors. We also have studied topological superconductors, discovering new topological superconductivity of higher spin electrons and revealing peculiar magnetic responses of Majorana excitations. Furthermore, we have proposed a comprehensive classification theory of non-Hermitian topological phases based on symmetry and energy gap structures intrinsic to non-Hermitian Hamiltonians.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は、トポロジカル結晶絶縁体・超伝導体と呼ばれる物質群を系統的に理論的に取り扱う枠組みを与えることに成功しており、これは将来の量子デバイス応用への基礎となる。また、トポロジカル超伝導体やマヨラナ励起に関する研究は、トポロジカル量子計算の量子ビットとしての応用が期待される。さらに、非エルミート・トポロジカル相の研究は、現実に存在する散逸により量子秩序相を制御できる可能性を示唆しており、実際にそれを応用したデバイスも提案され始めている。
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Report
(4 results)
Research Products
(89 results)
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[Journal Article] Multiple topological states in iron-based superconductors2018
Author(s)
P.Zhang, Z. Wang, X. Wu, K. Yaji, Y. Ishida, Y. Kohama, G. Dai, Y. Sun, C. Bareille1, K. Kuroda, T. Kondo1, K. Okazaki, K. Kindo1, X. Wang, C. Jin, J. Hu, R. Thomale, K. Sumida, S. Wu, K. Miyamoto, T. Okuda, H. Ding, G. D. Gu, T. Tamegai, T. Kawakami, M. Sato, S. Shin
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Journal Title
Nature Physics
Volume: 15
Issue: 1
Pages: 41-47
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Non-Hermitian Topological Phases2019
Author(s)
Masatoshi Sato
Organizer
Topological Quantum Matter: From Low-Temperature Physics to Non-Equilibrium Dynamics (NORDITA, Stockholm, Sweden, 2019/Jul/29-2019/Aug/23)
Related Report
Int'l Joint Research
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[Presentation] Non-Hermitian Topological Phases2019
Author(s)
Masatoshi Sato
Organizer
Highlights of Condensed matter physics: APW 2019& Tsinghua-RIKEN-KITS joint work shop (Tsinghua University, Beijin, China, 2019/Dec/6-8)
Related Report
Int'l Joint Research / Invited
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