Disorder-induced neutral solitons in degenerate ground state polymers
Soft Condensed Matter
2007-05-23 v1 Statistical Mechanics
Abstract
In this letter, we study the effects of weak off-diagonal disorder on conjugated polymers with a doubly degenerate ground-state. We find that disorder induces a finite density of neutral solitons in the lattice dimerization of a polymer chain. Interchain interactions result in a linear potential between the solitons and, if sufficiently strong, bind them into pairs resulting in an exponential suppression of the soliton density. As neutral solitons carry spin 1/2, they contribute to the polymer's magnetic properties. We calculate the magnetic susceptibility and suggest measurements of the magnetic susceptibility in {\it trans}-polyacetylene at low temperatures.
Keywords
Cite
@article{arxiv.cond-mat/9811240,
title = {Disorder-induced neutral solitons in degenerate ground state polymers},
author = {Marc Thilo Figge and Maxim V. Mostovoy and Jasper Knoester},
journal= {arXiv preprint arXiv:cond-mat/9811240},
year = {2007}
}
Comments
2 pages, 1 Postscript figure included, submitted to Synthetic Metals