TY - JOUR
T1 - Optic breathing mode, resonant charge fluctuations, and high-Tc superconductivity in the layered perovskites
AU - Fu, C. L.
AU - Freeman, A. J.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1987
Y1 - 1987
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.35.8861
DO - 10.1103/PhysRevB.35.8861
M3 - Article
AN - SCOPUS:4243260104
VL - 35
SP - 8861
EP - 8864
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 16
ER -