论文标题
刨床拓扑约瑟夫森连接的异常接近效应
Anomalous Proximity Effect of Planer Topological Josephson Junctions
论文作者
论文摘要
肮脏的超导连接处的异常接近效应是最引人注目的现象之一，突出了拓扑超导体中Majorana结合状态和奇数库珀对的深刻性质。通过最新的平面拓扑约瑟夫森连接的实验实现的动机，我们描述了超导体/半导体混合动力的异常接近效应，其中从拓扑结构约瑟夫森连接中扩展了额外的脏脏正常金属段。拓扑约瑟夫森连接中的拓扑相变，伴随着附着的脏脏法的低能运输特性的急剧变化。零偏置差分电导的量化仅在拓扑非平凡的相中才出现，这是由于主要结合状态和奇数频率库珀对进入肮脏的正常金属段引起的。结果，我们提出了一个实践实验，以观察异常的近端效应。
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.
