Print Email Facebook Twitter Magnetically tunable supercurrent in dilute magnetic topological insulator-based Josephson junctions Title Magnetically tunable supercurrent in dilute magnetic topological insulator-based Josephson junctions Author Mandal, Pankaj (University of Würzburg; Institute for Topological Insulators, Wurzburg) Mondal, Soumi (University of Würzburg; Institute for Topological Insulators, Wurzburg) Stehno, Martin P. (University of Würzburg; Institute for Topological Insulators, Wurzburg) Ilić, Stefan (Centro Mixto CSIC-UPV/EHU) Bergeret, F. Sebastian (Donostia International Physics Center; Centro Mixto CSIC-UPV/EHU) Klapwijk, T.M. (TU Delft QN/Afdelingsbureau; Kavli institute of nanoscience Delft) Gould, Charles (Universitat Wurzberg, Wurzberg; Institute for Topological Insulators, Wurzburg) Molenkamp, Laurens W. (University of Würzburg; Institute for Topological Insulators, Wurzburg) Date 2024 Abstract A superconductor, when exposed to a spin-exchange field, can exhibit spatial modulation of its order parameter, commonly referred to as the Fulde–Ferrell–Larkin–Ovchinnikov state. Such a state can be induced by controlling the spin-splitting field in Josephson junction devices, allowing access to a wide range of the phase diagram. Here we demonstrate that a Fulde–Ferrell–Larkin–Ovchinnikov state can be induced in Josephson junctions based on the two-dimensional dilute magnetic topological insulator (Hg,Mn)Te. We do this by observing the dependence of the critical current on the magnetic field and temperature. The substitution of Mn dopants induces an enhanced Zeeman effect, which can be controlled with high precision by using a small external magnetic field. We observe multiple re-entrant behaviours of the critical current as a response to an in-plane magnetic field, which we assign to transitions between ground states with a phase shifted by π. This will enable the study of the Fulde–Ferrell–Larkin–Ovchinnikov state in much more accessible experimental conditions. To reference this document use: http://resolver.tudelft.nl/uuid:390be0c8-ea3d-4ed2-8c10-33176f18a87f DOI https://doi.org/10.1038/s41567-024-02477-1 ISSN 1745-2473 Source Nature Physics Part of collection Institutional Repository Document type journal article Rights © 2024 Pankaj Mandal, Soumi Mondal, Martin P. Stehno, Stefan Ilić, F. Sebastian Bergeret, T.M. Klapwijk, Charles Gould, Laurens W. Molenkamp Files PDF s41567-024-02477-1.pdf 2.72 MB Close viewer /islandora/object/uuid:390be0c8-ea3d-4ed2-8c10-33176f18a87f/datastream/OBJ/view