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Superconductor-insulator transition in a disordered electronic system

Nandini Trivedi, Richard T. Scalettar, and Mohit Randeria
Phys. Rev. B 54, R3756(R) – Published 1 August 1996
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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.

  • Received 24 May 1996

DOI:https://doi.org/10.1103/PhysRevB.54.R3756

©1996 American Physical Society

Authors & Affiliations

Nandini Trivedi*

  • Materials Science Division 223, Argonne National Laboratory, Argonne, Illinois 60439 and Theoretical Physics Group, Tata Institute of Fundamental Research, Bombay 400005, India

Richard T. Scalettar

  • Department of Physics, University of California, Davis, California 95616

Mohit Randeria*

  • Materials Science Division 223, Argonne National Laboratory, Argonne, Illinois 60439 and Theoretical Physics Group, Tata Institute of Fundamental Research, Bombay 400005, India

  • *Present address.

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Vol. 54, Iss. 6 — 1 August 1996

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