Evolution of Edge States and Critical Phenomena in the Rashba Superconductor with Magnetization

Details Evolution of Edge States and Critical Phenomena in the Rashba Superconductor with Magnetization Evolution of Edge States and Critical Phenomena in the Rashba Superconductor with Magnetization

2011-10-03

arxiv.org/abs/1110.0358v4

Phys. Rev. Lett. 108, 087003 (2012)

Physics

Condensed Matter

Superconductivity

5 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.108.087003

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.

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