Spin exchange in quantum rings and wires in the Wigner-crystal limit
Strongly Correlated Electrons
2007-05-23 v4
Abstract
We present a controlled method for computing the exchange coupling in strongly correlated one-dimensional electron systems. It is based on the asymptotically exact relation between the exchange constant and the pair-correlation function of spinless electrons. Explicit results are obtained for thin quantum rings with realistic Coulomb interactions, by calculating this function via a many-body instanton approach.
Cite
@article{arxiv.cond-mat/0504502,
title = {Spin exchange in quantum rings and wires in the Wigner-crystal limit},
author = {Michael M. Fogler and Eugene Pivovarov},
journal= {arXiv preprint arXiv:cond-mat/0504502},
year = {2007}
}
Comments
7 pages, 2 figures. Changes in the text and figures to improve readability; added references