Phonon origin of low-energy and high-energy kinks in high-temperature cuprate superconductors
National Research Nuclear University “MEPhI” - Kashirskoe shosse, 31, Moscow, Russia
Corresponding author: EAMazur@mephi.ru
Accepted: 20 May 2010
The Eliashberg theory generalized for the account of the electron-hole nonequivalence and electron correlations in the vertex function is used. The phonon contribution to the nodal electron Green function in a normal state of cuprates is viewed. It is shown that near the optimal doping both the low-energy and high-energy nodal Green function kinks and also the abnormal broadening of a band in cuprates are reproduced with the electron-phonon interaction in the extended Eliashberg theory.
PACS: 74.72.-h – Cuprate superconductors / 74.20.-z – Theories and models of superconducting state / 74.25.Jb – Electronic structure (photoemission, etc.)
© EPLA, 2010