Superconducting diode effect in Ising superconductors
Itai Bankier, Lotan Attias, Alex Levchenko, Maxim Khodas
DOI 10.1103/PhysRevB.111.L180505 · Physical Review B
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Abstract
We study the superconducting diode effect (SDE) in an Ising superconductor with broken basal mirror symmetry in a parallel magnetic field. We show that in the presence of a small Rashba spin splitting, ΔR, the dominant Ising spin-orbit coupling (ΔI≫ΔR) dramatically enhances the SDE efficiency compared to a Rashba superconductor with ΔI=0 and the same ΔR. The suppression of the SDE for ΔI=0 at ΔR much larger than the critical temperature (Tc) is accidental. At ΔR≪Tc, the SDE efficiency is small because, to linear order, ΔR can be removed by a gauge transformation. These two factors—the accidental suppression of the SDE at large ΔR and the systematic suppression at small ΔR—are eliminated by Ising spin-orbit coupling. As a result, SDE efficiency is substantially enhanced for ΔI≫ΔR≠0.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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