Frustration induced Raman scattering in CuGeO_3

Details Frustration induced Raman scattering in CuGeO_3 Frustration induced Raman scattering in CuGeO_3

1996-08-23

arxiv.org/abs/cond-mat/9608106v1

Phys. Rev. B, Vol.54, R9635 (1996)

Physics

Condensed Matter

Phys. Rev. B, Rapid Comm, in Press

Scientific paper

10.1103/PhysRevB.54.R9635

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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