We study Andreev bound states (ABS) and resulting charge transport of Rashba superconductor (RSC) where two-dimensional semiconductor (2DSM) heterostructures is sandwiched by spin-singlet s-wave superconductor and ferromagnet insulator. ABS becomes a chiral Majorana edge mode similar to that in spinless chiral p-wave pairing in topological phase (TP). We clarify that two types of quantum criticality about the topological change of ABS near a quantum critical point (QCP), whether ABS exists at QCP or not. In the former type, ABS has a energy gap and does not cross at zero energy in non-topological phase (NTP). These complex properties can be detected by tunneling conductance between normal metal / RSC junctions.
@article{arxiv.1110.0358,
title = {Evolution of Edge States and Critical Phenomena in the Rashba Superconductor with Magnetization},
author = {Ai Yamakage and Yukio Tanaka and Naoto Nagaosa},
journal= {arXiv preprint arXiv:1110.0358},
year = {2012}
}