Issue 2, 2024

Asymmetric edge supercurrents in MoTe2 Josephson junctions

Abstract

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.

Graphical abstract: Asymmetric edge supercurrents in MoTe2 Josephson junctions

Supplementary files

Article information

Article type
Paper
Submitted
14 Oct 2023
Accepted
13 Dec 2023
First published
21 Dec 2023
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2024,6, 690-696

Asymmetric edge supercurrents in MoTe2 Josephson junctions

P. Chen, J. Wang, G. Wang, B. Ye, L. Zhou, L. Wang, J. Wang, W. Zhang, W. Chen, J. Mei and H. He, Nanoscale Adv., 2024, 6, 690 DOI: 10.1039/D3NA00884C

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