Volume 39, Number 4, August II 1997
|Page(s)||435 - 440|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Topological asymmetry in the damping-pairing contribution of electron-boson scattering
Institute of Electronic Structure and Laser
Foundation for Research and Technology, Hellas,
P.O. Box 1527, Heraklion, Crete 71110, Greece
2 DPMC, Université de Genève, 24 quai E. Ansermet, CH-1211 Genève 4, Switzerland
Accepted: 14 July 1997
We make a harmonic analysis of the pairing and damping contribution of a finite k range isotropic electron-phonon (or other boson) scattering in an anisotropic two-dimensional electronic system. We show that the pairing contribution of the anisotropic part of the electronic system can be much larger than its damping contribution enhancing significantly Tc. The higher is the order of the harmonic of the electronic anisotropy, the higher can be the asymmetry in its damping-pairing contribution. This could explain the puzzle of a much broader quasiparticle peak in the n-doped than in the p-doped cuprates, their smaller Tc's being also attributed to larger damping effects.
PACS: 74.25.Jb – Electronic structure / 74.20.-z – Theories and models of superconducting state
© EDP Sciences, 1997
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