Edge supercurrent in Josephson junctions based on topological materials

IF 6.4 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-08 DOI:10.1007/s11433-024-2520-9

Junjie Qi, Chui-Zhen Chen, Juntao Song, Jie Liu, Ke He, Qing-Feng Sun, X. C. Xie

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Abstract

The interplay between novel topological states and superconductivity has garnered substantial interest due to its potential for topological quantum computing. The Josephson effect serves as a useful probe for edge superconductivity in these hybrid topological materials. In Josephson junctions based on topological materials, supercurrents exhibit unique quantum interference patterns, including the conventional Fraunhofer oscillations, the Φ₀-periodic oscillation, and the 2Φ₀-periodic oscillation in response to the external magnetic field (Φ₀ = h/2e is the flux quantum, h the Planck constant, and e the electron charge). These interference patterns stem from varied Andreev reflection mechanisms and the associated current density profiles. This review seeks to comprehensively examine the theoretical and experimental advancements in understanding the quantum interference patterns of edge supercurrents in Josephson junctions based on quantum spin Hall, quantum Hall, and quantum anomalous Hall systems.

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基于拓扑材料的约瑟夫森结中的边缘超电流

新型拓扑态与超导性之间的相互作用因其在拓扑量子计算方面的潜力而备受关注。约瑟夫森效应是这些混合拓扑材料中边缘超导性的有用探针。在基于拓扑材料的约瑟夫森结中，超电流表现出独特的量子干涉模式，包括传统的弗劳恩霍夫振荡、Φ0周期振荡以及对外部磁场（Φ0 = h/2e为磁通量子，h为普朗克常数，e为电子电荷）做出响应的2Φ0周期振荡。这些干涉模式源于不同的安德烈耶夫反射机制和相关的电流密度曲线。本综述旨在全面考察在理解基于量子自旋霍尔、量子霍尔和量子反常霍尔系统的约瑟夫森结中边缘超级电流的量子干涉模式方面的理论和实验进展。

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来源期刊

Science China Physics, Mechanics & Astronomy PHYSICS, MULTIDISCIPLINARY-

CiteScore

10.30

自引率

6.20%

发文量

4047

审稿时长

3 months

期刊介绍： Science China Physics, Mechanics & Astronomy, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research. Science China Physics, Mechanics & Astronomy, is published in both print and electronic forms. It is indexed by Science Citation Index. Categories of articles: Reviews summarize representative results and achievements in a particular topic or an area, comment on the current state of research, and advise on the research directions. The author’s own opinion and related discussion is requested. Research papers report on important original results in all areas of physics, mechanics and astronomy. Brief reports present short reports in a timely manner of the latest important results.