Evidence for an edge supercurrent in the Weyl superconductor MoTe2

Wudi Wang, Stephan Kim, Minhao Liu, F. A. Cevallos, R. J. Cava, N. P. Ong

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Edge supercurrents in superconductors have long been an elusive target. Interest in them has reappeared in the context of topological superconductivity. We report evidence for the existence of a robust edge supercurrent in the Weyl superconductor molybdenum ditelluride (MoTe2). In a magnetic field B, fluxoid quantization generates a periodic modulation of the edge condensate observable as a “fast-mode” oscillation of the critical current Ic versus B. The fast-mode frequency is distinct from the conventional Fraunhofer oscillation displayed by the bulk supercurrent. We confirm that the fast-mode frequency increases with crystal area as expected for an edge supercurrent. In addition, weak excitation branches are resolved that display an unusual broken symmetry.

Original languageEnglish (US)
Pages (from-to)534-537
Number of pages4
JournalScience
Volume368
Issue number6490
DOIs
StatePublished - May 1 2020

All Science Journal Classification (ASJC) codes

  • General

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