Superconductive properties of binary amorphous alloys

On Superconducting Transition Temperature in Amorphous Alloys of Simple Metals

“…The problem of the superconducting transition in amorphous metals has some specific features [20][21][22]. A model of frozen liquid was exploited in Refs.…”

“…A model of frozen liquid was exploited in Refs. [21,22] in solving this problem. In comparison with the case of a crystalline ideal metal an additional term λ 1 , taking into account interaction of electrons with the transverse phonons, appears in the expression for the electron-phonon coupling constant.…”

“…In comparison with the case of a crystalline ideal metal an additional term λ 1 , taking into account interaction of electrons with the transverse phonons, appears in the expression for the electron-phonon coupling constant. λ [20][21][22]. Thus, the situation in a clean amorphous metal is very much similar to the case of a crystalline impure metal [14].…”

“…One should emphasize that the expression for the λ1-x term given in Refs. [20][21][22] can be derived from the appropriate equations obtained in Ref. [14], if the Ziman [23] formula for the time relaxation was used.…”

“…[20][21][22] draw also attention to another mechanism of the increase in the electron-phonon coupling constant which is specific for the amorphous metals only. The presence of the rotor-like minimum on the dispersion phonon curves in the short-wave region may cause an enhancement of λ in amorphous metals [21].…”