Influence of collective effects and the d-CDW on electronic Raman scattering in high-T$_c$ superconductors

Details Influence of collective effects and the d-CDW on electronic Raman scattering in high-T$_c$ superconductors Influence of collective effects and the d-CDW on electronic Raman scattering in high-T$_c$ superconductors

2002-10-04

arxiv.org/abs/cond-mat/0210101v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, will appear in PRL

Scientific paper

10.1103/PhysRevLett.89.177004

Electronic Raman scattering in high-T$_c$ superconductors is studied within the t-J model. It is shown that the A$_{1g}$ and B$_{1g}$ spectra are dominated by amplitude fluctuations of the superconducting and the d-wave CDW order parameters, respectively. The B$_{2g}$ spectrum contains no collective effects and its broad peak reflects vaguely the doping dependence of T$_c$, similarly to the pronounced peak in the A$_{1g}$ spectrum. The agreement of our theory with the experiment supports the picture of two different, competing order parameters in the underdoped regime of high-T$_c$ superconductors.

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