Anomalous proximity effect of planar topological Josephson junctions

被引:8
|
作者
Ikegaya, S. [1 ]
Tamura, S. [2 ]
Manske, D. [1 ]
Tanaka, Y. [2 ]
机构
[1] Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany
[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan
关键词
MAJORANA FERMIONS; SUPERCONDUCTIVITY; PHASE;
D O I
10.1103/PhysRevB.102.140505
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The anomalous proximity effect in dirty superconducting junctions is one of most striking phenomena highlighting the profound nature of Majorana bound states and odd-frequency Cooper pairs in topological superconductors. Motivated by the recent experimental realization of planar topological Josephson junctions, we describe the anomalous proximity effect in a superconductor/semiconductor hybrid, where an additional dirty normal-metal segment is extended from a topological Josephson junction. The topological phase transition in the topological Josephson junction is accompanied by a drastic change in the low-energy transport properties of the attached dirty normal metal. The quantization of the zero-bias differential conductance, which appears only in the topologically nontrivial phase, is caused by the penetration of the Majorana bound states and odd-frequency Cooper pairs into a dirty normal-metal segment. As a consequence, we propose a practical experiment for observing the anomalous proximity effect.
引用
收藏
页数:5
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