Supercurrent diode effect and finite momentum superconductivity

Abstract

When both inversion and time-reversal symmetries are broken, the critical current of a superconductor can be nonreciprocal. In this work we show that in certain classes of two-dimensional superconductors with antisymmetric spin-orbit coupling, Cooper pairs acquire a finite momentum upon the application of an in-plane magnetic field, and as a result, critical currents in the direction parallel and antiparallel to the Cooper pair momentum become unequal. This supercurrent diode effect is also manifested in the polarity-dependence of in-plane critical fields induced by a supercurrent. These nonreciprocal effects may be found in polar SrTiO${}_3$ film, few-layer MoTe${}_2$ in the $T_d$ phase, and twisted bilayer graphene in which the valley degrees of freedom plays the role analogous to spin.

12 pages, 4 figures. Proceedings of National Academy of Sciences in press

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Cited by in corpus (199)

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• Altermagnetic superconducting diode effect
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• Josephson Diode Effect Induced by Valley Polarization in Twisted Bilayer Graphene
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• Microscopic study of the Josephson supercurrent diode effect in Josephson junctions based on two-dimensional electron gas
• Superconducting diode effect and nonreciprocal transition lines
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• Sign reversal of the AC and DC supercurrent diode effect and 0-$\pi$-like transitions in ballistic Josephson junctions
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• Dissipation and geometry in nonlinear quantum transports of multiband electronic systems
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• Double-Fourier engineering of Josephson energy-phase relationships applied to diodes
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