Some aspects of the theory of the flux flow state in type II superconductors

This thesis examines some of the transport properties of type II superconductors in the mixed state. The emphasis is on theories of the electrical resistance and the energy current flow in an electric field. Using a time-dependent Ginsberg-Landau equation, derived using standard techniques, equations for the order parameter are obtained, correct to first order in the electric field. From the solutions to these equations the local current density accompanying an isolated moving vortex is obtained. This directly gives the transport current and hence the flux-flow resistivity. The energy current in the flux-flow state is calculated and an expression for the Ettingshausen coefficient for T-Tsub(C). obtained. Finally general transport relations are obtained an an estimate of the magnitude of the anomalous Hall effect in alloys is obtained. (author)