Momentum-dependent light scattering in insulating cuprates
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 A1g and B1g 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.
- Publication:
-
Physical Review B
- Pub Date:
- January 2007
- DOI:
- 10.1103/PhysRevB.75.020403
- arXiv:
- arXiv:cond-mat/0701289
- Bibcode:
- 2007PhRvB..75b0403V
- Keywords:
-
- 75.25.+z;
- 72.10.Di;
- 78.70.Ck;
- 72.80.Ga;
- Spin arrangements in magnetically ordered materials;
- Scattering by phonons magnons and other nonlocalized excitations;
- X-ray scattering;
- Transition-metal compounds;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- 5 pages, 3 figures, to appear in PRB