Surface density of states and topological edge states in noncentrosymmetric superconductors

被引：117

作者：

Yada, Keiji ^{[1
]}

Sato, Masatoshi ^{[2
]}

Tanaka, Yukio ^{[3
]}

Yokoyama, Takehito ^{[4
]}

机构：

[1] Nagoya Univ, Venture Business Lab, Nagoya, Aichi 4648603, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[3] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[4] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 06期

关键词：

D-WAVE SUPERCONDUCTORS; CONDUCTANCE;

D O I：

10.1103/PhysRevB.83.064505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 d(xy) + 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.

引用

页数：9

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