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Frustration induced Raman scattering in CuGeO_3

V. N. Muthukumar·Claudius Gros·Wolfgang Wenzel·Roser Valenti·P. Lemmens·B. Eisener·G. Güntherodt·M. Weiden·C. Geibel·F. Steglich
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Abstract

We present experimental data for the Raman intensity in the spin-Peierls compound CuGeO_3 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 1D-theory in the homogeneous phase and evidence for a novel 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 along the chains.

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V. N. Muthukumar, Claudius Gros, Wolfgang Wenzel, Roser Valenti, P. Lemmens, B. Eisener, G. Güntherodt, M. Weiden, C. Geibel, F. Steglich. 1996-08-23. Frustration induced Raman scattering in CuGeO_3. https://doi.org/10.1103/physrevb.54.r9635

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