Deconfinement and Dissipation in Quantum Hall "Josephson" Tunneling
Mesoscale and Nanoscale Physics
2009-11-10 v2 Statistical Mechanics
Superconductivity
Abstract
The zero-bias tunneling resonance in quantum Hall bilayer systems is investigated via numerical simulations of the classical two dimensional XY model with a symmetry-breaking field. Disorder is included in the model, and is shown to nucleate strings of overturned spins proliferated through the system, with unpaired vortices and antivortices at their endpoints. This string glass state supports low energy excitations which lead to anomalously large dissipation in tunneling, as observed in experiment. The effect of an in-plane magnetic field is discussed.
Cite
@article{arxiv.cond-mat/0301128,
title = {Deconfinement and Dissipation in Quantum Hall "Josephson" Tunneling},
author = {H. A. Fertig and Joseph P. Straley},
journal= {arXiv preprint arXiv:cond-mat/0301128},
year = {2009}
}
Comments
4 pages, 3 figures. Published version. Animations available at http://www.pa.uky.edu/~fertig/stringglass