A diagrammatic perturbative study of (i) effective mass and (ii) electron spectral function versus the adiabatic parameter in the Su–Schrieffer–Heeger model is presented. When zone boundary phonons energetically compete with band electrons we observe a sizeable mass enhancement. In two dimensions, a spread of the spectral weight signals the onset of polaron formation.
Polaronic features in the Su-Schrieffer-Heeger model
ZOLI, Marco
2003-01-01
Abstract
A diagrammatic perturbative study of (i) effective mass and (ii) electron spectral function versus the adiabatic parameter in the Su–Schrieffer–Heeger model is presented. When zone boundary phonons energetically compete with band electrons we observe a sizeable mass enhancement. In two dimensions, a spread of the spectral weight signals the onset of polaron formation.File in questo prodotto:
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