6533b82cfe1ef96bd128ea64

RESEARCH PRODUCT

Interference of nonequilibrium quasiparticles in a superconductor

K. Yu. ArutyunovJukka P. PekolaT. T. Hongisto

subject

SuperconductivityPhysicsCondensed matter physicsBiasingCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsInterference (wave propagation)Electronic Optical and Magnetic MaterialsMagnetic fieldAmplitudeCondensed Matter::SuperconductivityQuasiparticleElectrical and Electronic EngineeringCurrent (fluid)Voltage

description

Abstract We have observed an interference of nonequilibrium quasiparticles, injected from a copper electrode into an aluminium loop through a tunnel barrier. At temperatures below 1K the tunnel current at fixed voltage bias is periodically modulated by external magnetic field. The amplitude of the modulation reaches maximum at a bias slightly below the gap energy, and decreases with the further increase of the bias voltage. For a given voltage bias the amplitude of the current oscillations decreases with increase of the temperature and the loop circumference.

yearjournalcountryeditionlanguage
2003-05-01Physica B: Condensed Matter
https://doi.org/10.1016/s0921-4526(02)02357-8