Get Current-induced Nonequilibrium Phenomena in Quasi PDF

By Reinhard Tidecks

Ranging from the early experiments, this distinctive presentation, containing greater than 500 references, offers a entire evaluation on current-induced nonequilibrium phenomena in quasi-one-dimensional superconductors, best the reader from the basics to the newest study effects. Experiments on monocrystalline filaments (whiskers) - together with these received by means of the writer - are in comparison with effects on lengthy skinny movie microbridges and comparable species and interpreted in the theoretical framework. directions on experimental options are given and but unresolved difficulties are mentioned. The publication is definitely acceptable as an creation for the amateur and as a instruction manual for the energetic researcher.

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Extra resources for Current-induced Nonequilibrium Phenomena in Quasi One-dimensional Superconductors (Springer Tracts in Modern Physics)

Example text

Here, IqJl is time independent but not necessarily space independent as m u s t be assumed for a comparison with the London equations[2]. ,t)). (50) is valid in equilibrium. p instead of relative to [~F" This is expected to be the case for a c o n s t a n t c u r r e n t carrying NC/SC border where the quasiparticle distribution f u n c t i o n does n o t change in time. 9 for a discussion of this problem. 32 For ~0 = O in eq. ~- e q) = g~ + Q / 2 e N o - e 0). Since cp is spatially constant, also Q * / 2 e N 0 - e $ m u s t be equal to a c o n s t a n t .

Also the o rd e r p a r a m e t e r relaxation time, z&, which characterizes the relaxation of the Cooper pair density in the presence of a nonzero gap, depends on z E. There are several m e th o d s to measure the order p a r a m e t e r relaxation time. One m e t h o d is to illuminate a s u p e r c o n d u c t o r which is part of a tunnel junction of two s u p e r c o n d u c t o r s with a sh o r t laser pulse and to measure the real time r e s p o n s e of the junction v o l t ag e to the p e r t u r b a t i o n [110, 118,119].

O and s~>O, respectively. Furthermore , A ( T ) is the energy gap. 3. Charge Imbalance and Quasiparticle/Palr Electrochemical Potentials In this section we discuss the electrochemical potentials in a s u p e r c o n d u c t o r and their relation with the charge imbalance. In a s u p e r c o n d u c t o r two chemical potentials and their related electrochemical potentials are introduced, assigned to the Cooper pairs and quasiparticles, respectively. First we discuss the physical meaning of the electrochemical pair potential.

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