Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 97: Superconducting Diodes and Ratchets
TT 97.5: Vortrag
Freitag, 13. März 2026, 10:30–10:45, CHE/0089
Current pulse manipulation of the superconducting diode effect in FeSe — •Roemer Hinlopen1, Linus Holeschovsky1, Rebecca Nicholls2, Nigel Hussey2,3, Carsten Putzke1, and Philip Moll1 — 1Max Planck Institute for Structure and Dynamics of Matter, Luruper Chaussee 149, 22761 Hamburg, Germany — 2University of Bristol, HH Wills Laboratory, Tyndall Avenue, BS8 1TL Bristol, UK — 3High Field Magnet Laboratory (HFML-FELIX) and Institute for Molecules and Materials, Radboud University, Nijmegen 6525ED, Netherlands
The superconducting diode effect (SDE) has seen a surge in popularity in recent years for its potential technological applications. However, switching the sign of the SDE usually relies on reversing the polarity of the applied magnetic field on specifically designed device architectures which break the necessary symmetries. In this talk, we present a new means of control for the intrinsic SDE through microsecond current pulsing. We use focused ion beam (FIB) machining to create single crystalline devices of the strongly correlated nematic superconductor FeSe. We observe a clear intrinsic diode effect with effiency up to 30 %, which remains observable to a record applied magnetic field of 12 T. Our central result is that by sending intense microsecond current pulses through the device, we can deterministically manipulate the sign and strength of this SDE. This finding opens a new channel to control the SDE in devices and potentially realise a zero-field switchable device in the future.
Keywords: Superconductivity; Strongly correlated electron systems; Focused ion beam; Current pulsing; Superconducting diode effect