Abstract
The temperature and magnetic field dependence of the electrical conductance σ in thin granular-aluminum films has been measured in the temperature range 4.2–35 K above the superconducting transition temperature. The temperature dependence of conductance σ in zero magnetic field has been compared with a theory including the higher order contribution of the interaction, by evaluating the localization term from the analyses of the magnetoconductance. The σ in zero field agrees with the theory in a temperature of minimum conductance and in the temperature dependence at high temperatures, with a reasonable value of the average matrix element of the Coulomb interaction.
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