A mean field theory for the spin ladder system
Strongly Correlated Electrons
2016-08-31 v1 Statistical Mechanics
Abstract
In the present paper, we propose a mean field approach for spin ladders based upon the Jordan-Wigner transformation along an elaborately ordered path. We show on the mean field level that ladders with even number legs open a energy gap in their low energy excitation with a magnitude close to the corresponding experimental values, whereas the low energy excitation of the odd-number-leg ladders are gapless. It supports the validity of our approach. We then calculate the gap size and the excitation spectra of 2-leg-ladder system. Our result is in good agreement with both the experimental data and the numerical results.
Keywords
Cite
@article{arxiv.cond-mat/9709199,
title = {A mean field theory for the spin ladder system},
author = {Xi Dai and Zhao-bin Su},
journal= {arXiv preprint arXiv:cond-mat/9709199},
year = {2016}
}
Comments
14 pages,6 figure. submitted to Physical Review B