Theory of Microwave-Assisted Supercurrent in Diffusive SNS Junctions

Abstract

The observation of very large microwave-enhanced critical currents in superconductor-normal metal-superconductor (SNS) junctions at temperatures well below the critical temperature of the electrodes has remained without a satisfactory theoretical explanation for more than three decades. Here we present a theory of the supercurrent in diffusive SNS junctions under microwave irradiation based on the quasiclassical Green's function formalism. We show that the enhancement of the critical current is due to the energy redistribution of the quasiparticles in the normal wire induced by the electromagnetic field. The theory provides predictions across a wide range of temperatures, frequencies, and radiation powers, both for the critical current and the current-phase relationship.

4 pages, 4 figures

References in corpus (6)

• The Josephson critical current in a long mesoscopic S-N-S junction
• Phase controlled superconducting proximity effect probed by tunneling spectroscopy
• Supercurrent-carrying density of states in diffusive mesoscopic Josephson weak links
• Proximity Effect and Multiple Andreev Reflections in Diffusive SNS Junctions
• Ultrasensitive Proximity Josephson Sensor with Kinetic Inductance Read-Out
• Evidence for Two Time Scales in Long SNS Junctions

Cited by in corpus (22)

• Evidence of a nonequilibrium distribution of quasiparticles in the microwave response of a superconducting aluminium resonator
• Gate-Defined Josephson Junctions in Magic-Angle Twisted Bilayer Graphene
• Frequency-dependent admittance of a short superconducting weak link
• Theory of microwave-assisted supercurrent in quantum point contacts
• Microwave response of an NS ring coupled to a superconducting resonator
• Supercurrent and Andreev bound state dynamics in superconducting quantum point contacts under microwave irradiation
• Linear AC Response of Diffusive SNS Junctions
• Half-integer Shapiro steps in highly transmissive InSb nanoflag Josephson junctions
• Nonadiabatic Dynamics of Strongly Driven Diffusive Josephson Junctions
• Admittance of a long diffusive SNS junction
• Quasiclassical theory for antiferromagnetic metals
• The discovery, disappearance and re-emergence of radiation-stimulated superconductivity
• Phase-dependent dissipation and supercurrent of a graphene-superconductor ring under microwave irradiation
• Microwave Admittance of Gold-Palladium Nanowires with Proximity-Induced Superconductivity
• Microwave-induced conductance replicas in hybrid Josephson junctions without Floquet-Andreev states
• Nonlinear Resonance of Superconductor/Normal Metal Structures to Microwaves
• Dynamical I-V Characteristics of SNS Junctions
• Strong effects of weak ac driving in short superconducting junctions
• Temporarily enhanced superconductivity from magnetic fields
• Spin-orbit pumping
• Absorption of heat into a superconductor-normal metal-superconductor junction from a fluctuating environment
• Interference between magnetic field and cavity modes in an extended Josephson junction