1993/09/22 by M. Wallin, E. Sorensen, S. M. Girvin +1 · 1 citation
Physics and Astronomy · #cond-mat
paper · pdf · doi:10.1103/physrevb.49.12115
Revtex 3.0, 54 pages, 17 figures included, UBCTP-93-017
arxiv created 1993/09/22 · arxiv updated 2009/11/30
Universal properties of the zero temperature superconductor-insulator transition in two-dimensional amorphous films are studied by extensive Monte Carlo simulations of bosons in a disordered medium. We report results for both short-range and long-range Coulomb interactions for several different points in parameter space. In all cases we observe a transition from a superconducting phase to an insulating Bose glass phase. From finite-size scaling of our Monte Carlo data we determine the universal conductivity σ^* and the critical exponents at the transition. The result σ^* = (0.55 ± 0.06) (2e)2/h for bosons with long-range Coulomb interaction is roughly consistent with experiments reported so far. We also find σ^* = (0.14 ± 0.03) (2e)2/h for bosons with short-range interactions.