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Intrinsic superconducting diode effect in disordered systems
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abstract
Nonreciprocal transport phenomena have attracted much attention in modern condensed matter physics. In the field of superconductivity, the superconducting diode effect (SDE) has been one of the central topics. Recent theoretical studies for the SDE in intrinsic mechanism revealed the relation between the SDE and helical superconductivity, for which experimental clarification has been awaited. In this work, we establish a microscopic theory of the intrinsic SDE in disordered systems. We show that the sign reversal of the nonreciprocal critical current is suppressed under moderate impurity concentrations. However, even in the moderately disordered region, the SDE shows a feature signaling the change in the nature of helical superconductivity. It is also found that the diode quality factor $r$ is increased by disorders and reaches 20% in the Rashba-Zeeman model.
Forward citations
Cited by 2 Pith papers
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Superconducting Diode Effect in Weak Localization Regime
The superconducting diode effect in a dirty Rashba superconductor survives weak-localization and Coulomb-interaction corrections in the high-temperature, low-field regime, with a universal scaling form for the diode q...
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Superconducting diode efficiency from singlet-triplet mixing in disordered systems
Disorder scattering can reverse the sign of the superconducting diode efficiency at weak Rashba coupling and can induce a finite diode effect at strong Rashba coupling through singlet-triplet mixing.
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