Superconductor-Insulator Transition in a Disordered Electronic System

Abstract

We study an electronic model of a 2D superconductor with onsite randomness using Quantum Monte Carlo simulations. The superfluid density is used to track the destruction of superconductivity in the ground state with increasing disorder. The non-superconducting state is identified as an insulator from the temperature dependence of its d.c. resistivity. The value of ${\sigma }_{\mathrm{dc}}$ at the superconductor-insulator transition appears to be non-universal.

PostScript, 4 pages, figures included

References in corpus (1)

• Deviations from Fermi-liquid behavior above $T_c$ in 2D short coherence length superconductors

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