Superconducting quantum interference devices made of Sb-doped Bi2Se3 topological insulator nanoribbons

被引：9
作者：
Kim, Nam-Hee [1 ]
Kim, Hong-Seok [1 ]
Hou, Yasen [2 ]
Yu, Dong [2 ]
Doh, Yong-Joo [1 ]
机构：
[1] GIST, Dept Phys & Photon Sci, Gwangju 61005, South Korea
[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
来源：
CURRENT APPLIED PHYSICS | 2020年 / 20卷 / 05期
基金：
美国国家科学基金会;
关键词：
Topological insulator nanoribbon; Superconducting quantum interference device; Aharonov-bohm oscillations; Fraunhofer pattern; Majorana bound state; WEAK ANTILOCALIZATION; SURFACE-STATES; TRANSPORT;
D O I：
10.1016/j.cap.2020.02.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the fabrication and characterization of superconducting quantum interference devices (SQUIDs) made of Sb-doped Bi2Se3 topological insulator (TI) nanoribbon (NR) contacted with PbIn superconducting electrodes. When an external magnetic field was applied along the NR axis, the TI NR exhibited periodic magneto-conductance oscillations, the so-called Aharonov-Bohm oscillations, owing to one-dimensional subbands. Below the superconducting transition temperature of PbIn electrodes, we observed supercurrent flow through TI NR-based SQUID. The critical current periodically modulates with a magnetic field perpendicular to the SQUID loop, revealing that the periodicity corresponds to the superconducting flux quantum. Our experimental observations can be useful to explore Majorana bound states (MBS) in TI NR, promising for developing topological quantum information devices.
引用
收藏
页码：680 / 685
页数：6
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