Quantitative expression of the spin gap via bosonization for a dimerized spin-1/2 chain
Strongly Correlated Electrons
2007-05-23 v1 Statistical Mechanics
Abstract
Using results on the mass gap in the sine-Gordon model combined with the exact amplitudes in the bosonized representation of the Heisenberg spin-1/2 chain and one-loop renormalization group, we derive a quantitative expression for the gap in a dimerized spin-1/2 chain. This expression is shown to be in good agreement with recent numerical estimates when a marginally irrelevant perturbation is taken into account.
Keywords
Cite
@article{arxiv.cond-mat/0403175,
title = {Quantitative expression of the spin gap via bosonization for a dimerized spin-1/2 chain},
author = {Edmond Orignac},
journal= {arXiv preprint arXiv:cond-mat/0403175},
year = {2007}
}
Comments
5 pages, 2 EPS figures, uses svjour.cls