期刊
PHYSICAL REVIEW RESEARCH
卷 1, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.1.013012
关键词
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资金
- Topological Materials Science of MEXT, Japan
- Materials Education program for the future leaders in Research, Industry, and Technology (MERIT)
- JSPS KAKENHI [JP15H05884, JP15H05745, JP18H04225, JP18H01178, JP18H05227, JP17K17678]
- JST PRESTO [JPMJPR18LA]
The systematic diagnosis of band topology enabled by the method of symmetry indicators underlies the recent advances in the search for new materials realizing topological crystalline insulators. Such an efficient method has been missing for superconductors because the quasiparticle spectrum in the superconducting phase is not usually available. In this work, we establish symmetry indicators for weak-coupling superconductors that detect nontrivial topology based on the representations of the metallic band structure in the normal phase, assuming a symmetry property of the gap function. We demonstrate the applications of our formulas using examples of tight-binding models and density-functional-theory band structures of realistic materials.
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