Optic breathing mode, resonant charge fluctuations, and high-Tc superconductivity in the layered perovskites

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Abstract

Frozen-phonon optical breathing mode calclations on La2-xMxCuO4 (M=Ba,Sr,...) demonstrate the following: (i) a large (3 eV/A) electron-phonon interaction matrix element for the &O px,y orbitals, (ii) a high frequency (110 meV), and (iii) large charge fluctuations (0.3 electrons). Especially significant is the possible resonant coupling to, and enhancement of, the natural ground-state Cu2+-Cu3+ charge fluctuations between in-plane Cu atoms. The relation of these results to the high Tc (and previous theoretical descriptions of superconductivity) is indicated.

Original languageEnglish
Pages (from-to)8861-8864
Number of pages4
JournalPhysical Review B
Volume35
Issue number16
DOIs
Publication statusPublished - 1987

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Electron-phonon interactions
perovskites
breathing
Superconductivity
Ground state
Optics
superconductivity
optics
Atoms
Electrons
electron phonon interactions
orbitals
ground state
augmentation
matrices
atoms
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Optic breathing mode, resonant charge fluctuations, and high-Tc superconductivity in the layered perovskites. / Fu, C. L.; Freeman, Arthur J.

In: Physical Review B, Vol. 35, No. 16, 1987, p. 8861-8864.

Research output: Contribution to journalArticle

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