Momentum dependent light scattering in insulating cuprates

2007/01/12 by F. H. Vernay, M. J. P. Gingras, T. P. Devereaux · 1 citation
Physics and Astronomy · #cond-mat.str-el #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.75.020403

published as Phys. Rev. B vol. 75, 020403(R) (2007) · 5 pages, 3 figures, to appear in PRB

arxiv created 2007/01/12 · arxiv updated 2009/12/01

Abstract

We investigate the problem of inelastic x-ray scattering in the spin-1/2 Heisenberg model on the square lattice. We first derive a momentum dependent scattering operator for the A_1g and B_1g polarization geometries. On the basis of a spin-wave analysis, including magnon-magnon interactions and exact-diagonalizations, we determine the qualitative shape of the spectra. We argue that our results may be relevant to help interpret inelastic x-ray scattering experiments in the antiferromagnetic phase of the cuprates.

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