Monte Carlo Simulations of a Disordered Superconductor-Metal Quantum Phase Transition
We investigate the quantum phase transitions of a disordered nanowire from superconducting to metallic behavior by employing extensive Monte Carlo simulations. To this end, we map the quantum action onto a (1+1)-dimensional classical XY model with long-range interactions in imaginary time. We then analyze the finite-size scaling behavior of the order parameter susceptibility, the correlation time, the superfluid density, and the compressibility. We find strong numerical evidence for the critical behavior to be of infinite-randomness type and to belong to the random transverse-field Ising universality class, as predicted by a recent strong disorder renormalization group calculation.
A. K. Ibrahim and T. Vojta, "Monte Carlo Simulations of a Disordered Superconductor-Metal Quantum Phase Transition," European Physical Journal B, vol. 91, no. 12, Springer Heidelberg, Dec 2018.
The definitive version is available at https://doi.org/10.1140/epjb/e2018-90497-5
Keywords and Phrases
Solid State and Materials
International Standard Serial Number (ISSN)
Article - Journal
© 2018 Springer Heidelberg, All rights reserved.
01 Dec 2018