Giant electron-phonon anomaly in doped La2CuO4 and other cuprates

Details Giant electron-phonon anomaly in doped La2CuO4 and other cuprates Giant electron-phonon anomaly in doped La2CuO4 and other cuprates

2009-09-03

arxiv.org/abs/0909.0769v3

Advances in Condensed Matter Physics, vol. 2010, Article ID 523549, 24 pages, 2010. doi:10.1155/2010/523549

Physics

Condensed Matter

Superconductivity

Review article. To appear in Advances in Condensed Matter Physics, Special Issue: Phonons and Electron Correlations in High-Te

Scientific paper

10.1155/2010/523549

Since conventional superconductivity is mediated by phonons, their role in the mechanism of high temperature superconductivity has been considered very early after the discovery of the cuprates. The initial consensus was that phonons could not produce transition temperatures near 100K, and the main direction of research focused on nonphononic mechanisms. Subsequent work last reviewed by L. Pintschovius in 2005 showed that electron-phonon coupling in the cuprates is surprisingly strong for some phonons and its role is controversial. Experiments performed since then identified anomalous behavior of certain Cu-O bond-stretching phonons in cuprates as an important phenomenon that is somehow related to the mechanism of superconductivity. A particularly big advance was made in the study of doped La2CuO4. This work is reviewed here.

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