Kavli Affiliate: Ran Wang
| First 5 Authors: Ran Wang, Ran Wang, , ,
| Summary:
The intrinsic superconducting diode effect (SDE) is distinguished from the
Josephson diode effect (JDE) by its manifestation of nonreciprocal critical
current phenomena within a monolithic superconductor, typically linked to
finite-momentum Cooper pairing. The long-standing assumption that SDE requires
co-breaking of time-reversal and inversion symmetries proves to be necessary
but not sufficient. In this work, we propose a universal diagnostic criterion.
Embodied in two concise inequalities, this criterion enables convenient and
intuitive assessment of whether an intrinsic SDE can emerge in a given system
without requiring extensive numerical calculations. Furthermore, our universal
criterion provides explicit design guidelines for material systems exhibiting
intrinsic SDE.
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