Modeling flux-flow dissipation from randomly placed strong-pinning sites and comparison with ion-irradiated cuprate superconductors

摘要

The interaction of an Abrikosov vortex lattice with randomly placed strong pinning centers (produced experimentally with heavy-ion irradiation) has been modeled with a particularly simple and powerful expression. Excellent quantitative fits to the dissipation in ion-irradiated Tl2Ba2CaCu2Ox are found for T/T-c = 0.75-0.9 over ranges of 10000 in resistance and 60 in field. The three free parameters are within a factor of 2 of expectations. [References: 10]