Surface density of states and topological edge states in noncentrosymmetric superconductors
Surface density of states and topological edge states in noncentrosymmetric superconductors
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DOI：
10.1103/physrevb.83.064505
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发表时间：
2010-11
影响因子：
3.7
通讯作者：
K. Yada;M. Sato;Yukio Tanaka;T. Yokoyama
中科院分区：
文献类型：
--
作者：
K. Yada;M. Sato;Yukio Tanaka;T. Yokoyama
我们研究非中心对称超导体的安德烈夫束缚态 (ABS) 和表面态密度 (SDOS)，其中自旋单重态 $d$ 波配对与自旋三重态 $p$（或 $f）$ 波通过自旋轨道耦合混合。对于 $d_{xy} + p$ 波配对，ABS 显示为零能量状态。当前的 ABS 是保留时间反转对称性的马约拉纳边缘模式。我们计算拓扑不变数并讨论与单个马约拉纳边缘模式的相关性。在存在马约拉纳边缘模式的情况下，SDOS 强烈依赖于塞曼场的方向。
We study Andreev bound state (ABS) and surface density of state (SDOS) of non-centrosymmetric superconductor where spin-singlet $d$-wave pairing mixes with spin-triplet $p$ (or $f)$-wave one by spin-orbit coupling. For $d_{xy} + p$-wave pairing, ABS appears as a zero energy state. The present ABS is a Majorana edge mode preserving the time reversal symmetry. We calculate topological invariant number 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.