Nonequilibrium electron cooling by NIS tunnel junctions

Details Nonequilibrium electron cooling by NIS tunnel junctions Nonequilibrium electron cooling by NIS tunnel junctions

2008-10-31

arxiv.org/abs/0810.5741v2

J. Low Temp. Phys. 154, 221 (2009)

Physics

Condensed Matter

Superconductivity

12 pages, 6 figures, proceedings, to be published in JLTP

Scientific paper

10.1007/s10909-009-9869-z

We discuss the theoretical framework to describe quasiparticle electric and heat currents in NIS tunnel junctions in the dirty limit. The approach is based on quasiclassical Keldysh-Usadel equations. We apply this theory to diffusive NIS'S tunnel junctions. Here N and S are respectively normal metal and superconductor reservoirs, I is an insulator layer and S' is a nonequilibrium superconducting lead. We calculate the quasiparticle electric and heat currents in such structures and consider the effect of inelastic relaxation in the S' lead. We find that in the absence of strong relaxation the electric current and the cooling power for voltages $eV < \Delta$ are suppressed. The value of this suppression scales with the diffusive transparency parameter. We ascribe this suppression to the effect of backtunneling of nonequilibrium quasiparticles into the normal metal.

Affiliated with

Also associated with

No associations

Rating

Nonequilibrium electron cooling by NIS tunnel junctions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nonequilibrium electron cooling by NIS tunnel junctions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonequilibrium electron cooling by NIS tunnel junctions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-457423