Abstract
We report on a study of resonant magnetic Raman scattering from antiferromagnetic cuprates. The measured absolute magnitude of the Raman efficiency of YBa 2Cu 3O 6.0 rises to 1.2 × 10 −3 sr −1 cm −1 at 2.7 eV laser energy, with an onset at approximately 2 eV. Similar results are obtained for La 2CuO 4, Nd 2CuO 4, and YBa 2Cu 3O 6.3. A theory based on the three-band Hubbard model is presented, which agrees quantitatively with the experimental data.
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