Superconductivity and Anderson Localization in Zinc Films

Abstract

Temperature and magnetic field dependence of conductivity in resistive thin films of Zn was measured. In zero field, conductivity decreased as ln T as temperature was lowered and showed an enhanced paraconductivity which diverged at T_c. When field was applied, T_c decreased, ln T dependence extended to lower temperature and the coefficent of ln T increased. The origin of these results was discussed from the view point of electron localization and interaction effects in two dimensional disordered metal.