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arXiv · 1005.3930

Phonon origin of low energy and high energy kinks in high temperature cuprate superconductors

E. A. Mazur
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Abstract

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 cuprates is viewed. At non- zero temperatures the singularities (kinks) in the frequency behavior of a real and imaginary part of an electron nodal Green function, and also in the nodal part of the density of the electron states modified by an electron-phonon interaction are studied. 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.

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E. A. Mazur. 2010-07-04. Phonon origin of low energy and high energy kinks in high temperature cuprate superconductors. https://doi.org/10.1209/0295-5075%2F90%2F47005

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