Surface density of states and topological edge states in noncentrosymmetric superconductors

Keiji Yada; Masatoshi Sato; Yukio Tanaka; Takehito Yokoyama

doi:10.1103/PhysRevB.83.064505

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Surface density of states and topological edge states in noncentrosymmetric superconductors

Keiji Yada, Masatoshi Sato, Yukio Tanaka, Takehito Yokoyama

DOI 10.1103/PhysRevB.83.064505 · Physical Review B

T1

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Abstract

We study an Andreev bound state (ABS) and the surface density of state (SDOS) of a noncentrosymmetric superconductor where spin-singlet d-wave pairing mixes with spin-triplet p (or f)-wave pairing by spin-orbit coupling. For dxy+p-wave pairing, the ABS appears as a zero-energy state. The present ABS is a Majorana edge mode preserving the time-reversal symmetry. We calculate the topological invariant and discuss the relevance to a single Majorana edge mode. In the presence of the Majorana edge mode, the SDOS depends strongly on the direction of the Zeeman field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pt3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LaNiC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown