Disorder-Induced Topological Defects in a d=2 Elastic Medium at Zero Temperature
Disordered Systems and Neural Networks
2009-10-31 v1 Statistical Mechanics
Superconductivity
Abstract
The density and correlations of topological defects are investigated numerically in a model of a d=2 elastic medium subject to a periodic quenched random potential. The computed density of defects decreases approximately exponentially with the defect core energy. Comparing the defect-free ground state with the ground state with defects, it is found that the difference is described by string-like excitations, bounded by defect pairs, which have a fractal dimension of 1.250(3). At zero temperature, the disorder-induced defects screen the interaction of introduced vortex pairs.
Cite
@article{arxiv.cond-mat/9807374,
title = {Disorder-Induced Topological Defects in a d=2 Elastic Medium at Zero Temperature},
author = {A. Alan Middleton},
journal= {arXiv preprint arXiv:cond-mat/9807374},
year = {2009}
}
Comments
4 pages, 4 figures included