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arXiv · 2406.14612

Superconducting Diode Effect in Multiphase Superconductors

Daniel Shaffer·Dmitry V. Chichinadze·Alex Levchenko
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Abstract

We identify a new mechanism for the intrinsic superconducting diode effect (SDE) in multiphase superconductors. Using a Ginzburg-Landau and a microscopic two-band model, we find phase transitions into a mixed phase with finite-momentum Cooper pairs and SDE with high (including maximal) diode efficiencies, despite the individual phases exhibiting no SDE and equal inversion parity. We thus show that parity mixing $-$ invoked in previous proposals $-$ is not a crucial ingredient for SDE. The new mechanism may be relevant in a multitude of known multiphase superconductors like UTe$_2$.

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Daniel Shaffer, Dmitry V. Chichinadze, Alex Levchenko. 2024-06-20. Superconducting Diode Effect in Multiphase Superconductors. https://doi.org/10.1103/physrevb.110.184509

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