Metallic stripes and the universality of the anomalous half-breathing phonon in high-Tc cuprates

Details Metallic stripes and the universality of the anomalous half-breathing phonon in high-Tc cuprates Metallic stripes and the universality of the anomalous half-breathing phonon in high-Tc cuprates

2007-04-19

arxiv.org/abs/0704.2622v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, submitted to PRL 18.04.2007

Scientific paper

We demonstrate that the strong anomalies in the high frequency LO-phonon spectrum in cuprate superconductors can in principle be explained by the enhanced electronic polarizability associated with the self-organized one dimensionality of metallic stripes. Contrary to the current interpretation in terms of transversal stripe fluctuations, the anomaly should occur at momenta parallel to the stripes. The doping dependence of the anomaly is naturally explained, and we predict that the phonon line-width and the spread of the anomaly in the transverse momentum decrease with increasing temperature while high resolution measurements should reveal a characteristic substructure to the anomaly.

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