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- W2572636056 abstract "321 In a number of recent experimental works (1-7) using angleresolved photoemission spectroscopy (ARPES) (8, 9), the temperature dependence of the real and imaginary parts of the selfenergy (SE) com� ponent of the electron Green function (GF) in cuprates has been investigated. The correct interpreta� tion of the effect of temperature on the form of the fre� quency dependence of the SF component in cuprates will help to reveal the mechanisms responsible for peculiar properties of these materials in the normal state. It has been shown previously (10) that the allow� ance for the deviation of the electron density of states from a constant value in the vicinity of the Fermi sur� face leads to a reconstruction of the SE component and the electron density of states in the electron- phonon (EP) system. It has been inquired whether the abovementioned temperature dependence of the SE component of the GF is a consequence of the EO interaction or is due to some additional electron mechanisms. For this purpose, the extended version of the Migdal-Eliashberg theory (10) was applied for nonzero temperatures ( T ≠ 0) in the Numbu represen� tation with allowance for the finiteness of the band� width, the variability of the electron density of states, and additional effects of nonequivalence of electrons and holes. Abstract—The phonon contribution to the nodal electron Green function in cuprates is considered. It is shown that the temperature dependence of the real part of the selfenergy component of the Green function for cuprates with a hole doping level close to optimal is described by the electron-phonon interaction in the framework of the extended Eliashberg model." @default.
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- W2572636056 date "2012-01-01" @default.
- W2572636056 modified "2023-09-26" @default.
- W2572636056 title "ORDER, DISORDER, AND PHASE TRANSITION IN CONDENSED SYSTEM Effect of Temperature on Phonon Contribution to Green Function of HighTemperature Superconducting Cuprates" @default.
- W2572636056 hasPublicationYear "2012" @default.
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