Noncentrosymmetric superconductors in one dimension

Article

关键词: QUASI-PARTICLE STATES;    MAJORANA FERMIONS;    BOUND-STATES;    SURFACE;    INTERFACE;   

DOI  :  10.1103/PhysRevB.95.064504

来源: SCIE

【 摘 要 】

We study the fermionic boundary modes (Andreev bound states) in a time-reversal invariant one-dimensional superconductor. In the presence of a substrate, spatial inversion symmetry is broken and the electronic properties are strongly affected by an antisymmetric spin-orbit coupling. We assume an arbitrary even number of nondegenerate bands crossing the Fermi level. We show that there is only one possible pairing symmetry in one dimension, an analog of s-wave pairing. The zero-energy Andreev bound states are present if the sign of the gap function in an odd number of the bands is different from all other bands.

【 授权许可】

Free