The Effect of Pressure on Superconducting State Parameters and Transition Temperature of Simple Metal Superconductors

Abstract

A method is presented for the theoretical calculation of the logarithmic volume derivatives of the three superconducting state parameters, the phonon interaction parameter, the coulomb pseudopotential, and the energy renormalization parameter. The two representative cases of lead and aluminium have been studied. The initial linear drop of T, when plotted against change in volume, which is experimentally observed fact, is theoretically confirmed.Eine Methode zur theoretischen Berechnung der logarithmischen Volumenableitungen der drei Supraleitungszustandparameter, des Phononen-Wechselwirkungsparameters, des Coulomb-Pseudopotentials und des Energie-Renormierungsparameters, wird angegeben. Die beiden reprasentativen Fiille Blei und Aluminium wurden untersucht. Der lineare Anfangsabfall von 27, als Funktion der Volumeniinderung, der eine experimentell beobachtete Tatsache ist, wird theoretisch erkliirt.

Superconducting state parameters of aluminium using OPW form factors at reduced volumes

“…1. In this approach the Coulomb pseudopotential is slightly overestimated as compared to previous studies (1,2)…”