Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session K42: Topological Superconductivity in Van Der Waals Materials
3:00 PM–5:36 PM,
Tuesday, March 7, 2023
Room: Room 318
Sponsoring
Unit:
DMP
Chair: Suyang Xu, Harvard University
Abstract: K42.00010 : Josephson Junctions of Nodal Superconductors: Role of Spin-orbit coupling
5:12 PM–5:24 PM
Presenter:
Ranjani Seshadri
(Ben Gurion University of the Negev)
Authors:
Ranjani Seshadri
(Ben Gurion University of the Negev)
Maxim Khodas
(Hebrew University of Jerusalem)
Dganit Meidan
(Ben Gurion University)
When an externally applied in-plane magnetic field is increased beyond the Pauli critical limit, superconductivity survives due to the
presence of a strong Ising spin-orbit coupling. However, a quantum phase transition occurs into a nodal superconducting phase hosting
Majorana flat bands. This is reflected in the 4π periodicity of the Josephson current-phase relation, which is a function of the momentum
perpendicular to the direction of the current as well as the magnitude of the applied magnetic field. By including the effect of a Rashba
spin-orbit coupling, the behavior of this Josephson current becomes sensitive also to the direction of the in-plane field.
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