Frustration induced Raman scattering in CuGeO_3

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.

arXiv commentPhys. Rev. B, Rapid Comm, in Press

References in corpus (3)

• DMRG Studies of the Spin-Half Heisenberg System with Dimerization and Frustration
• Study of the magnetic susceptibility in the spin-Peierls system CuGeO${}_3$
• Investigation of the Spin-Peierls transition in CuGeO_3 by Raman scattering

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