Abstract
We study an electronic model of a two-dimensional -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 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