Dzyaloshinskii-Moriya interaction in NaV2O5: a microscopic study
Abstract
We present a unified account of magnetic exchange and Raman scattering in the quasi-one-dimensional transition-metal oxide NaV2O5. Based on a cluster-model approach explicit expressions for the exchange integral and the Raman-operator are given. It is demonstrated that a combination of the electronic-structure and the Dzyaloshinskii-Moriya interaction, allowed by symmetry in this material, are responsible for the finite Raman cross-section giving rise to both, one- and two-magnon scattering amplitudes.
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