Year: 1997
Type: article
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 quasielastic line analogous to experiment.
Author: Wolfram Brenig
Institution: University of Cologne
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2095545100