Reinhardt, Simon and Ascherl, T. and Costa, A. and Berger, J. and Gronin, S. and Gardner, G. C. and Lindemann, T. and Manfra, M. J. and Fabian, Jaroslav and Kochan, Denis and Strunk, Christoph and Paradiso, Nicola (2024) Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry. NATURE COMMUNICATIONS, 15 (1): 4413. ISSN , 2041-1723
Full text not available from this repository. (Request a copy)Abstract
In Josephson diodes the asymmetry between positive and negative current branch of the current-phase relation leads to a polarity-dependent critical current and Josephson inductance. The supercurrent nonreciprocity can be described as a consequence of the anomalous Josephson effect -a phi 0-shift of the current-phase relation- in multichannel ballistic junctions with strong spin-orbit interaction. In this work, we simultaneously investigate phi 0-shift and supercurrent diode efficiency on the same Josephson junction by means of a superconducting quantum interferometer. By electrostatic gating, we reveal a direct link between phi 0-shift and diode effect. Our findings show that spin-orbit interaction in combination with a Zeeman field plays an important role in determining the magnetochiral anisotropy and the supercurrent diode effect. The authors study the intrinsic superconducting diode effect (SDE) in a single Josephson junction consisting of a InGaAs/InAs/InGaAs quantum well as the weak link, and an Al film as the superconductor. They find a correspondence between SDE and an offset in the relationship between critical current and the difference in phase of the superconducting order parameter across the junction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SUPERCONDUCTIVITY; ELECTRON; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jan 2026 09:36 |
| Last Modified: | 26 Jan 2026 09:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64252 |
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