Electron-Phonon Renormalization in Cuprate Superconductors
Peihong Zhang, Steven G. Louie, Marvin L. Cohen
DOI 10.1103/PhysRevLett.98.067005 · Physical Review Letters
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Abstract
Electron-phonon (e−ph) renormalization effects in a model cuprate system CaCuO2 are studied by employing density functional theory based methods. Whereas calculations based on the local spin-density approximation (LSDA) predicts negligible e−ph coupling effects of the half-breathing Cu-O bond stretching mode, the inclusion of a screened on-site Coulomb interaction (U) in the LSDA+U calculations greatly enhances the e−ph coupling strength of this mode. The full-breathing mode, on the other hand, shows a much weaker e−ph renormalization effect.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CaCuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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