Diode efficiency in Rashba superconductors peaks at the Lifshitz transition to strong helical phases with Bogoliubov Fermi surfaces, while Josephson current anisotropy offers a probe for these surfaces in junctions.
In the strong spin-orbit coupling limit, as the two helical bands decouple, the Andreev levels of each band do not mix and can be treated separately
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Helical phases and Bogoliubov Fermi surfaces probed by superconducting diode effects
Diode efficiency in Rashba superconductors peaks at the Lifshitz transition to strong helical phases with Bogoliubov Fermi surfaces, while Josephson current anisotropy offers a probe for these surfaces in junctions.