Raman spectrum and charge fluctuations in the copper-oxide superconductors

Details Raman spectrum and charge fluctuations in the copper-oxide superconductors Raman spectrum and charge fluctuations in the copper-oxide superconductors

1995-02-02

arxiv.org/abs/cond-mat/9502009v1

Physics

Condensed Matter

4 pages plus 3 compressed & uuencoded eps figures, LATEX 2.09, published in Physica C 235-240 (1994) 2265-2266, proceedings fr

Scientific paper

The effect of the charge fluctuations on the electronic spectrum and the Raman spectrum of high temperature superconductors is examined within the slave boson approach. Instead of using the saddle point approximation for slave bosons, we confine ourselves to the non-crossing approximation (NCA) in summing the diagrams for the Green functions, thus obtaining the renormalized hole spectrum and its lifetime on equal footing. The electronic Raman spectrum is calculated, showing the characteristic featureless behaviour up to the frequency of the order of renormalized $\Delta_{pd}$ parameter. The dependence on the polarization of the incident and the scattered light agrees with experiments.

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