Journal
PHYSICAL REVIEW B
Volume 82, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.184536
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Funding
- JSPS [20340098, 21540378]
- Grants-in-Aid for Scientific Research [21540378, 20340098] Funding Source: KAKEN
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We propose a Z(2) index theorem for a generic topological superconductor in class D with a point defect. Introducing a particle-hole symmetry breaking term depending on a parameter and regarding it as a coordinate of an extra dimension, we define the index of the zero modes and corresponding topological invariant for such an extended Hamiltonian. It is shown that these are related with the number of the zero modes of the original Hamiltonian modulo 2.
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