Superconductor-insulator transition in a disordered electronic system
Nandini Trivedi, Richard T. Scalettar, Mohit Randeria
DOI 10.1103/PhysRevB.54.R3756 · Physical Review B
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Abstract
We study an electronic model of a two-dimensional s-wave superconductor in a random potential using quantum Monte Carlo simulations. The superfluid density and the strength of the delta function in the optical conductivity are found to vanish beyond a critical disorder. We calculate the temperature-dependent resistivity ρdc(T) for a highly disordered interacting Fermi system. Using this we identify the nonsuperconducting state as an insulator.
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