Superinsulator Phase of Two-Dimensional Superconductors
Superconductivity
2009-10-31 v1
Abstract
Using path-integral Quantum Monte Carlo we study the low-temperature phase diagram of a two-dimensional superconductor within a phenomenological model, where vortices have a finite mass and move in a dissipative environment modeled by a Caldeira-Leggett term. The quantum vortex liquid at high magnetic fields exhibits superfluidity and thus corresponds to a {\em superinsulating} phase which is characterized by a nonlinear voltage-current law for an infinite system in the absence of pinning. This superinsulating phase is shifted to higher magnetic fields in the presence of dissipation.
Cite
@article{arxiv.cond-mat/9809337,
title = {Superinsulator Phase of Two-Dimensional Superconductors},
author = {A. Krämer and S. Doniach},
journal= {arXiv preprint arXiv:cond-mat/9809337},
year = {2009}
}
Comments
8 pages, 3 figures, to appear in Phys. Rev. Lett. (Oktober 1998)