Anomalous Andreev Bound State in Noncentrosymmetric Superconductors

Yukio Tanaka; Yoshihiro Mizuno; Takehito Yokoyama; Keiji Yada; Masatoshi Sato

doi:10.1103/PhysRevLett.105.097002

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Anomalous Andreev Bound State in Noncentrosymmetric Superconductors

Yukio Tanaka, Yoshihiro Mizuno, Takehito Yokoyama, Keiji Yada, Masatoshi Sato

DOI 10.1103/PhysRevLett.105.097002 · Physical Review Letters

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Abstract

We study edge states of noncentrosymmetric 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 bound state appears at the edge. The charge conductance in the noncentrosymmetric superconductor junctions reflects the anomalous structures of the dispersions, particularly the time-reversal invariant Majorana bound state is manifested as a zero bias conductance peak.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LaAlO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown