Nonequilibrium effects in tunnel Josephson junctions
Journal article, 2005

We study nonequilibrium effects in current transport through voltage biased tunnel junction with long diffusive superconducting leads at low applied voltage eV 2Δ, and finite temperatures. Due to a small value of the Josephson frequency, the quasiparticle spectrum adiabatically follows the time evolution of the superconducting phase difference, which results in the formation of oscillating bound states in the vicinity of the tunnel junction (Andreev band). The quasiparticles trapped by the Andreev band generate higher even harmonics of the. Josephson ac current, and also, in the presence of inelastic scattering, a nonequilibrium dc current, which may considerably exceed the dc quasiparticle current given by the tunnel model. The distribution of traveling quasiparticles also deviates from the equilibrium due to the spectrum oscillations, which results in an additional contribution to the dc current, proportional to V.

Author

Eugene Bezuglyi

Institute for Low Temperature Physics and Engineering

Andrey Vasenko

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Vitaly Shumeiko

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Göran Wendin

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 72 014501

Subject Categories

Inorganic Chemistry

Other Physics Topics

Information Systemes, Social aspects

Condensed Matter Physics

DOI

10.1103/PhysRevB.72.014501

More information

Latest update

9/7/2018 8