Low-energy signatures of charge and spin fluctuations in Raman and optical spectra of the cuprates

Abstract

We calculate the optical and Raman response within a phenomenological model of fermion quasiparticles coupled to nearly critical collective modes. We find that, whereas critical scaling properties might be masked in optical spectra due to charge conservation, distinct critical signatures of charge and spin fluctuations can be detected in Raman spectra exploiting specific symmetry properties. We compare our results with recent experiments on the cuprates.

arXiv comment6 pages, 4 figures, Proceedings of the Conference SMEC 2007 - Study of Matter at Extreme Conditions, Miami 2007

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Cited by in corpus (2)

• Signatures of nematic quantum critical fluctuations in the Raman spectra of lightly doped cuprates
• On the contribution of nearly-critical spin and charge collective modes to the Raman spectra of high-Tc cuprates