Download Current-Induced Nonequilibrium Phenomena in by Reinhard Tidecks PDF

By Reinhard Tidecks

Ranging from the early experiments, this targeted presentation, containing greater than 500 references, presents a finished evaluate on current-induced nonequilibrium phenomena in quasi-one-dimensional superconductors, major the reader from the basics to the newest learn effects. Experiments on monocrystalline filaments (whiskers) - together with these received by way 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 strategies are given and but unresolved difficulties are mentioned. The ebook is easily perfect as an advent for the beginner and as a instruction manual for the lively researcher.

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This should be a good approximation for w e a k - c o u p l i n g s u p e r c o n d u c t o r s . We explicitly remark that the time t 0 is n o t a quasiparticle relaxation time, but is related to ~E bye80] ~E = % / 8 . 4 (74) Similar to Tinkham's r e s u l t for ~E , the expression f o r t 0 also contains a f a c t o r T~0"3. Kaplan et al. summarized values of % for several pure materials and s o m e Pb based alloys (see Tab. 1 of ref. 103). There are several m e th o d s to m e a s u r e t~: The 'classical' a r r a n g e m e n t is an N C I / I / S C / I / N C 2 double tunnel junction.

The t e m p e r a t u r e dependence of % is much s t r o n g e r than the predicted To0-3 law yields and the dependence of zE on the electron mean free path ( o r residual resistivity) is 42 not in agreement with a theory considering electron-phonon and e l e c t r o n - e l e c t r o n collisions in t h r e e - d i m e n s i o n a l sam p l es at zero t e m p e r a t u r e [92,96]. A s t r o n g dependence of the measured inelastic s c a t t e r i n g time on film t h i ck n es s and s h e e t r e s i s t a n c e is observed [140,146, 1483.

67) would lead to the r e s u l t that %*e1 is at least proportional to AT". Very cl o se to To it is even ~:Q*el ~ AT-:. 40 The r e s u l t for zQ*in depends on the inelastic collision time t E. Since t~ is a very i m p o r t a n t quantity, a detailed discussion of this time will be given in the f o l l o w i n g . A value for t E has been calculated by Tinkham [see eq. (28) of ref. 1023, namely t E = ( z o / 8 . 3. Furthermore, P298~ is the phonon-induced t e m p e r a t u r e d e p e n d e n t part of the resistivity at room temperature.

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