期刊
PHYSICAL REVIEW B
卷 83, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.235115
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资金
- Research Corporation for Science Advancement
- office of the Provost of Yeshiva University
We use a monodromy argument to derive new expressions for the Z(2) invariants of topological insulators with time-reversal symmetry in two and three dimensions. The derivations and the final expressions do not require any gauge choice and the calculation of the invariants is based entirely on the projectors onto the occupied states. Explicit numerical tests for tight-binding models with strongly broken inversion symmetry are presented in two and three dimensions.
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