Z(2) index theorem for Majorana zero modes in a class D topological superconductor

Article

关键词: HALL CONDUCTANCE;    INVARIANT;    SYSTEM;   

DOI  :  10.1103/PhysRevB.82.184536

来源: SCIE

【 摘 要 】

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.

【 授权许可】

Free