6533b7d4fe1ef96bd12633d4
RESEARCH PRODUCT
Nonadiabatic dynamics in strongly driven diffusive Josephson junctions
Christopher StrunkPauli VirtanenJulien BassetMarco ApriliMarko KuzmanovićTero T. HeikkiläJulien GabelliJérôme Estèvesubject
Electromagnetic fieldJosephson effectsuprajohtavuusFOS: Physical sciences01 natural sciences010305 fluids & plasmassuprajohteetSuperconducing RFCondensed Matter::SuperconductivityMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciences[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physics[PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]PhysicsSuperconductivity[PHYS]Physics [physics]Condensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsSupercurrentJosephson effectCondensed Matter::Mesoscopic Systems and Quantum Hall Effect[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]Distribution functionMicrowave irradiationproximity effectQuasiparticledescription
By measuring the Josephson emission of a diffusive Superconductor-Normal metal-Superconductor (SNS) junction at a finite temperature we reveal a non-trivial sensitivity of the supercurrent to microwave irradiation. We demonstrate that the harmonic content of the current-phase relation is modified due to the energy redistribution of quasiparticles in the normal wire induced by the electromagnetic field. The distortion originates from the phase-dependent out-of-equilibrium distribution function which is strongly affected by the ac-response of the spectral supercurrent. For phases close to $\pi$, transitions accross the Andreev gap are dynamically favored leading to a supercurrent reduction. This finding is supported by a comparison with the quasiclassical Green's function theory of superconductivity in diffusive SNS junctions under microwave irradiation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-01 |