Pseudo-gap and vertex correction of electron-phonon interaction

Details Pseudo-gap and vertex correction of electron-phonon interaction Pseudo-gap and vertex correction of electron-phonon interaction

2010-09-14

arxiv.org/abs/1009.2552v1

Physics

Condensed Matter

Superconductivity

Scientific paper

The strong-coupling Eliashberg theory plus vertex correction is used to calculate the maps of transition temperature (Tc) in parameter-space characterizing superconductivity. Based on these Tc maps, complex crossover behaviors are found when electron-phonon interaction increases from weak-coupling region to strong-coupling region. The doping-dependent Tc of cuprate superconductors and most importantly the pseudo-gap can be explained as the effects of vertex correction.

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