期刊
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
卷 2022, 期 4, 页码 -出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/ptep/ptab124
关键词
I60; I65
资金
- Core Research for Evolutional Science and Technology (JST CREST) [JPMJCR19T2]
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP18H05227, JP18H01178,, JP20H05159]
- SPIRITS 2020 of Kyoto University
Searching for topological insulators/superconductors is a central topic in recent condensed matter physics. Classification methods and symmetry are used to investigate the topological properties, and both theoretical and experimental research are being conducted.
Searching for topological insulators/superconductors is a central subject in recent condensed matter physics. As a theoretical aspect, various classification methods of symmetry-protected topological phases have been developed, where the topology of a gapped Hamiltonian is investigated from the viewpoint of its onsite/crystal symmetry. On the other hand, topological physics also appears in semimetals, whose gapless points can be characterized by topological invariants. Stimulated by this background, we shed light on the topology of nodal superconductors. In this paper, we review our modern topological classification theory of superconducting gap nodes in terms of symmetry. The classification method elucidates nontrivial gap structures arising from nonsymmorphic symmetry or angular momentum, which cannot be predicted by a conventional theory.
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