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Frustration-induced Raman scattering in CuGeO3

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Citation

Muthukumar, V. N., Gros, C., Wenzel, W., Valenti, R., Lemmens, P., Eisener, B., et al. (1996). Frustration-induced Raman scattering in CuGeO3. Physical Review B, 54(14), R9635-R9638. doi:10.1103/PhysRevB.54.R9635.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-E7E1-5
Abstract
We present experimental data for the Raman intensity in the spin-Peierls compound CuGeO3 and theoretical calculations from a one-dimensional frustrated spin model, The theory is based on (a) exact diagonalization and (b) a recently developed solitonic mean-field theory. We find good agreement between the one-dimensional theory in the homogeneous phase and evidence for an interesting dimerization of the Raman operator in the spin-Peierls state. Finally we present evidence for a coupling between the interchain exchange, the spin-Peierls order parameter, and the magnetic excitations dong the chains.