Probing the minigap in topological insulator-based Josephson junctions under radio frequency irradiation

论文摘要

Recently, a contact-resistance-measurement method was developed to detect the minigap, hence the Andreev bound states（ABSs）, in Josephson junctions constructed on the surface of three-dimensional topological insulators（3D TIs）.In this work, we further generalize that method to the circumstance with radio frequency（rf） irradiation. We find that with the increase of the rf power, the measured minigap becomes broadened and extends to higher energies in a way similar to the rf power dependence of the outer border of the Shapiro step region. We show that the corresponding data of contact resistance under rf irradiation can be well interpreted by using the resistively shunted Josephson junction（RSJ）model and the Blonder–Tinkham–Klapwijk（BTK） theory. Our findings could be useful when using the contact-resistancemeasurement method to study the Majorana-related physics in topological insulator-based Josephson junctions under rf irradiation.

论文目录

文章来源

类型: 期刊论文

作者: 杨光,吕昭征,张祥,屈凡明,吕力

来源: Chinese Physics B 2019年12期

年度: 2019

分类: 基础科学,工程科技Ⅱ辑

专业: 电力工业

单位: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,School of Physical Sciences, University of Chinese Academy of Sciences,Songshan Lake Materials Laboratory,CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences,Beijing Academy of Quantum Information Sciences

基金: Project supported by the National Basic Research Program of China(Grant Nos.2016YFA0300601,2017YFA0304700,and 2015CB921402),the National Natural Science Foundation China(Grant Nos.11527806,91221203,11174357,91421303,and 11774405),the Strategic Priority Research Program B of the Chinese Academy of Sciences(Grant Nos.XDB07010100 and XDB28000000),the Beijing Municipal Science&Technology Commission,China(Grant No.Z191100007219008)

分类号: TM216

页码: 56-59

总页数: 4

文件大小: 592K

下载量: 9

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