Dependence of Weak Localization Magnetoconductivity on Flux Line Structure

A numerical simulation in real space was developed to investigate weak localization corrections to the conductivity in inhomogeneous magnetic fields created by flux lines. Both cylinder model and exponential one of flux lines were studied. It was shown that the corrections are sensitive to the flux line structure. Comparing to the experiments of Bending et al., the results show that the flux line in Pb film can be approximately described by the cylinder model.