Edelstein effect induced superconducting diode effect in inversion symmetry breaking MoTe${}_2$ Josephson junctions

Abstract

Superconducting diode effect (SDE) with nonreciprocal supercurrent transport has attracted intense attention recently, not only for its intriguing physics, but also for its great application potential in superconducting circuits. It is revealed in this work that planar Josephson junctions (JJs) based on type-II Weyl semimetal (WSM) MoTe${}_2$ can exhibit a prominent SDE due to the emergence of asymmetric Josephson effect (AJE) in perpendicular magnetic fields. The AJE manifests itself in a very large asymmetry in the critical supercurrents with respect to the current direction. The sign of this asymmetry can also be effectively modulated by the external magnetic field. Considering the special noncentrosymmetric crystal symmetry of MoTe${}_2$, this AJE is understood in terms of the Edelstein effect, which induces a nontrivial phase shift in the current phase relation of the junctions. Besides these, it is further demonstrated that the rectification of supercurrent in such MoTe${}_2$ JJs with the rectification efficiency up to 50.4%, unveiling the great application potential of WSMs in superconducting electronics.

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• High-temperature field-free superconducting diode effect in high-Tc cuprates
• Superconducting Diode Effects: Mechanisms, Materials and Applications
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• Engineered Josephson diode effect in kinked Rashba nanochannels
• Nonreciprocal superconducting transport and the spin Hall effect in gyrotropic structures
• Time reversal symmetry breaking and zero magnetic field Josephson diode effect in Dirac semimetal Cd3As2-mediated asymmetric SQUIDs
• Non-Hermitian superconducting diode effect
• Spin and orbital Edelstein effect in spin-orbit coupled noncentrosymmetric superconductor
• Josephson diode effect in nanowire-based Andreev molecules
• Josephson diodes induced by the loop current states
• Enhanced Superconducting Diode Effect in the Asymmetric Hatsugai-Kohmoto Model
• Gate-tunable Josephson diodes in magic-angle twisted bilayer graphene
• Nanoscale electrothermal-switch superconducting diode for electrically programmable superconducting circuits
• Thermodynamic Constraints on Perfect Equilibrium Superconducting Diodes