Raman Scattering from Frustrated Quantum Spin Chains

Wolfram Brenig

doi:10.1103/PhysRevB.56.2551

Raman Scattering from Frustrated Quantum Spin Chains

Strongly Correlated Electrons 2016-08-31 v1

Authors: Wolfram Brenig

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Abstract

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.

Keywords

raman spectroscopy spin excitations in condensed matter quantum spin chains

Cite

@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}
}

Comments

13 pages, Revtex, 3 eps-figures

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