Multiphase superconductivity at the interface between ultrathin FeTe islands and Bi2Te3

Authors

V. Tkáč, S. Vorobiov, P. Baloh, M. Vondráček, G. Springholz, K. Carva, P. Szabó, P. Hofmann, J. Honolka

Laboratory / Department
Department of Analysis of Functional Materials
DOI
10.1038/s41699-024-00480-x
Year
2024

Topological superconductivity is predicted to appear at interfaces between superconductors and topological insulators arising from the proximity of the non-trivial topology of the latter. From temperature and magnetic field dependent transport studies in our recent publication, we directly prove a superconducting ground state in monolayer thin FeTe on the bulk topological insulator Bi2Te3 and assign field-dependent breaking of Cooper pairs to be of orbital character.

4-3_Multiphase superconductivity at the interface Image-Honolka.png
(a) Electrical measurement setup of silicon (a-Si) protected FeTe on the bulk topological insulator Bi2Te3 at varying magnetic fields B (b) Resistance drops indicative of a superconductive phase transition in FeTe.