HALL EFFECT IN SUPERCONDUCTORS ABOVE Tc

Abstract

We consider the Aslamazov-Larkin term in the Hall conductivity near Tc, and find that the sign of this term is determined by ∂Tc/∂μ, where μ is Fermi level. We show that the AL term cannot explain the sign change of the Hall conductivity in high temperature superconductors. We also show that weak damping helicon waves exist in classical weak magnetic field due to the very strong increasing of AL term near Tc.