Weak localization of disordered quasiparticles in the mixed superconducting state

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  • 26 August 1998
Abstract
Starting from a random matrix model, we construct the low energy effective field theory for the noninteracting gas of quasiparticles of a disordered superconductor in the mixed state. The theory is a nonlinear sigma model, with the order parameter field being a supermatrix whose form is determined solely on symmetry grounds. The weak localization correction to the field-axis thermal conductivity is computed for a dilute array of s wave vortices near the lower critical field H_c1. We also comment on recent high-T_c experimental data by Aubin et al.

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