Raman Scattering from Frustrated Quantum Spin Chains
强关联电子
2016-08-31 v1
摘要
Magnetic Raman scattering from a frustrated spin-1/2 Heisenberg-chain is considered with a focus on the uniform phase of the spin-Peierls compound CuGeO_3. The Raman intensity is analyzed in terms of a Loudon-Fleury scattering process using a spinless-fermion mean-field theory developed for the frustrated spin-chain. A comparison to experimental data is presented and the frustration and temperature dependence is studied. In good agreement with observed spectra a broad inelastic four-spinon continuum is found at low temperatures above the spin-Peierls transition. At high temperatures the intensity develops a quasi-elastic line analogous to experiment.
引用
@article{arxiv.cond-mat/9702210,
title = {Raman Scattering from Frustrated Quantum Spin Chains},
author = {Wolfram Brenig},
journal= {arXiv preprint arXiv:cond-mat/9702210},
year = {2016}
}
备注
13 pages, Revtex, 3 eps-figures