Asymmetric edge supercurrents in MoTe2 Josephson junctions

Pingbo Chen1,2; Jinhua Wang2; Gongqi Wang2; Bicong Ye2,3; Liang Zhou2; Le Wang4; Jiannong Wang3; Wenqing Zhang5,6; Weiqiang Chen2,6; Jiawei Mei2,6; Hongtao He2,6

2024

10.1039/d3na00884c

Nanoscale Advances   影响因子和分区

2516-0230

To investigate the higher order topology in MoTe2, the supercurrent interference phenomena in Nb/MoTe2/Nb planar Josephson junctions have been systematically studied. By analyzing the obtained interference pattern of the critical supercurrents and performing a comparative study of the edge-touched and untouched junctions, it's found that the supercurrent is dominated by the edges, rather than the bulk or surfaces of MoTe2. An asymmetric Josephson effect with a field-tunable sign is also observed, indicating the nontrivial origin of the edge states. These results not only provide initial evidence for the hinge states in the higher order topological insulator MoTe2, but also demonstrate the potential applications of MoTe2-based Josephson junctions in rectifying the supercurrent.

SCI ; EI

英语

共同第一 ; 通讯

National Key Research and Development Program of China[2022YFA1403700] ; National Key Research and Development Program of China[2021A1515010046] ; Natural Science Foundation of Guangdong Province["ZDSYS20190902092905285","GXWD20201230110313001"] ; Science, Technology and Innovation Commission of Shenzhen Municipality[2020KCXTD001]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001143095800001

ROYAL SOC CHEMISTRY

20240215360519

Tellurium Compounds

人工提交

1.Department of Physics, Harbin Institute of Technology, Harbin 150001, China
2.epartment of Physics, Southern University of Science and Technology, Shenzhen 518055, China. E-mail: heht@sustech.edu.cn
3.Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China
4.Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
5.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
6.Shenzhen Key Laboratory for Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China

Pingbo Chen,Jinhua Wang,Gongqi Wang,et al. Asymmetric edge supercurrents in MoTe2 Josephson junctions[J]. Nanoscale Advances,2024,6(2):690–696.

Pingbo Chen.,Jinhua Wang.,Gongqi Wang.,Bicong Ye.,Liang Zhou.,...&Hongtao He.(2024).Asymmetric edge supercurrents in MoTe2 Josephson junctions.Nanoscale Advances,6(2),690–696.

Pingbo Chen,et al."Asymmetric edge supercurrents in MoTe2 Josephson junctions".Nanoscale Advances 6.2(2024):690–696.