Anomalous Andreev bound state in non-centrosymmetric superconductors

Details Anomalous Andreev bound state in non-centrosymmetric superconductors Anomalous Andreev bound state in non-centrosymmetric superconductors

2010-06-17

arxiv.org/abs/1006.3544v2

Phys. Rev. Lett. 105, 097002 (2010)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures. References and details of the tunneling conductance are added

Scientific paper

10.1103/PhysRevLett.105.097002

We study edge states of non-centrosymmetric superconductors where spin-singlet d-wave pairing mixes with spin-triplet p (or f)-wave one by spin-orbit coupling. For dxy-wave pairing, the obtained Andreev bound state has an anomalous dispersion as compared to conventional helical edge modes. A unique topologically protected time-reversal invariant Majorana fermion appears at the edge. The charge conductance in the non-centrosymmetric superconductor junctions reflects the anomalous structures of the dispersions, particularly the time-reversal invariant Majorana fermion is manifested as a zero bias conductance peak.

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