Exact Analysis of ESR Shift in the Spin-1/2 Heisenberg Antiferromagnetic Chain
Statistical Mechanics
2009-11-11 v3 Strongly Correlated Electrons
Abstract
A systematic perturbation theory is developed for the ESR shift and is applied to the spin-1/2 Heisenberg chain. Using the Bethe ansatz technique, we exactly analyze the resonance shift in the first order of perturbative expansion with respect to an anisotropic exchange interaction. Exact result for the whole range of temperature and magnetic field, as well as asymptotic behavior in the low-temperature limit are presented. The obtained g-shift strongly depends on magnetic fields at low temperature, showing a significant deviation from the previous classical result.
Keywords
Cite
@article{arxiv.cond-mat/0501295,
title = {Exact Analysis of ESR Shift in the Spin-1/2 Heisenberg Antiferromagnetic Chain},
author = {Y. Maeda and K. Sakai and M. Oshikawa},
journal= {arXiv preprint arXiv:cond-mat/0501295},
year = {2009}
}
Comments
4 pages, 3 figures,to be published in Phys. Rev. Lett