Physics

Magnetically tunable supercurrent in dilute magnetic topological insulator-based Josephson junctions

P. Mandal, S. Mondal, et al.

This groundbreaking research by Pankaj Mandal and team explores the fascinating induction of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in Josephson junctions using the two-dimensional dilute magnetic topological insulator (Hg,Mn)Te. Their findings reveal intriguing re-entrant behaviors of critical current related to π-shifted ground states, driven by an enhanced Zeeman effect under an external magnetic field.

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Abstract

This paper demonstrates the induction of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in Josephson junctions based on the two-dimensional dilute magnetic topological insulator (Hg,Mn)Te. By observing the critical current's dependence on magnetic field and temperature, the authors show multiple re-entrant behaviors assigned to transitions between π-shifted ground states. The enhanced Zeeman effect, controlled by an external magnetic field, facilitates the study of the FFLO state under more accessible experimental conditions.

Publisher

Nature Physics

Published On

Jun 01, 2024

Authors

Pankaj Mandal, Soumi Mondal, Martin P. Stehno, Stefan Ilić, F. Sebastian Bergeret, Teun M. Klapwijk, Charles Gould, Laurens W. Molenkamp

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