WEAK-LOCALIZATION, ASLAMAZOV-LARKIN, AND MAKI-THOMPSON SUPERCONDUCTING FLUCTUATION EFFECTS IN DISORDERED ZR1-XRHX FILMS ABOVE T-C

摘要

The transverse magnetoresistance of disordered Zr1-xRhx thin films has been measured above the superconducting transition temperature T-c as a function of temperature in a magnetic field up to 60 kG. The investigated films are disordered enough to indicate quantum corrections due to localization and electron-electron interaction effects. The field and temperature dependence of the observed magnetoresistance is interpreted in terms of weak-localization, Aslamazov-Larkin, and Maki-Thompson superconducting fluctuations effects. From the comparison of the experimental results with theoretical calculations, the electron-electron attraction strength, beta(T/T-c), is derived and is in good agreement with Larkin's theory. The total phase-breaking rate tau(phi)(-1) has been estimated and ascribed to electron-phonon, electron-electron, electron-fluctuation, and spin-flip scattering mechanisms. [References: 41]