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arXiv · 1006.3544

Anomalous Andreev bound state in non-centrosymmetric superconductors

Yukio Tanaka·Yoshihiro Mizuno·Takehito Yokoyama·Keiji Yada·Masatoshi Sato
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Abstract

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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Yukio Tanaka, Yoshihiro Mizuno, Takehito Yokoyama, Keiji Yada, Masatoshi Sato. 2010-07-19. Anomalous Andreev bound state in non-centrosymmetric superconductors. https://doi.org/10.1103/physrevlett.105.097002

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