Doping dependence of density response and bond-stretching phonons in cuprates

Details Doping dependence of density response and bond-stretching phonons in cuprates Doping dependence of density response and bond-stretching phonons in cuprates

2005-01-11

arxiv.org/abs/cond-mat/0501239v1

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 3 figures, SCES conference, Karlsruhe 2004

Scientific paper

10.1016/j.physb.2005.01.170

We explain the anomalous doping dependence of zone boundary $(\pi,0)$ and
$(\pi,\pi)$ bond-stretching phonons in the high-temperature superconductor
La$_{2-\delta}$Sr$_{\delta}$CuO$_4$ in the doping range $0<\delta<0.35$. Our
calculations are based on a theory for the density response of doped
Mott-Hubbard insulators.

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