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正常与超导引线界面上的马约拉纳态导致的自旋敏感干涉。

Spin-sensitive interference due to Majorana state on the interface between normal and superconducting leads.

作者信息

Barański J, Kobiałka A, Domański T

机构信息

Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland.

出版信息

J Phys Condens Matter. 2017 Feb 22;29(7):075603. doi: 10.1088/1361-648X/aa5214. Epub 2016 Dec 30.

Abstract

We investigate the subgap spectrum and transport properties of the quantum dot on the interface between the metallic and superconducting leads and additionally side-coupled to the edge of the topological superconducting (TS) chain, hosting the Majorana quasiparticle. Due to the chiral nature of the Majorana states only one spin component of the quantum dot electrons (say [Formula: see text]) is directly affected, however the proximity induced on-dot pairing transmits its influence on the opposite spin as well. We investigate the unique interferometric patterns driven by the Majorana quasiparticle that are different for each spin component. We also address the spin-sensitive interplay with the Kondo effect manifested at the same zero-energy and we come to the conclusion that quantum interferometry can unambiguously identify the Majorana quasiparticle.

摘要

我们研究了位于金属和超导引线界面上且额外与承载马约拉纳准粒子的拓扑超导(TS)链边缘侧耦合的量子点的亚能隙光谱和输运性质。由于马约拉纳态的手征性质,量子点电子的仅一个自旋分量(比如说[公式:见原文])会直接受到影响,然而邻近诱导的量子点上配对也会将其影响传递到相反的自旋上。我们研究了由马约拉纳准粒子驱动的独特干涉图样,每个自旋分量的干涉图样都不同。我们还探讨了在相同零能量下表现出的与近藤效应的自旋敏感相互作用,并且得出结论:量子干涉测量能够明确识别马约拉纳准粒子。

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