Electron-phonon vs. electron-impurity interactions with small electron bandwidths

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dc.creatorDougan, Fatih
dc.creatorMarsiglio, Frank
dc.date2006-03-23
dc.date.accessioned2026-07-07T07:04:54Z
dc.date.available2026-07-07T07:04:54Z
dc.descriptionIt is common practice to try to understand electron interactions in metals by defining a hierarchy of energy scales. Very often, the Fermi energy is considered the largest, so much so that frequently bandwidths are approximated as infinite. The reasoning is that attention should properly be focused on energy levels near the Fermi level, and details of the bands well away from the Fermi level are unimportant. However, a finite bandwidth can play an important role for low frequency properties: following a number of recent papers, we examine electron-impurity and electron-phonon interactions in bands with finite widths. In particular, we examine the behaviour of the electron self energy, spectral function, density of states, and dispersion, when the phonon spectral function is treated realistically as a broad Lorentzian function. With this phonon spectrum, impurity scattering has a significant non-linear effect.
dc.description7 pages with 10 figures, to be published in Journal of Superconductivity
dc.identifierhttps://arxiv.org/abs/cond-mat/0603635
dc.identifierhttp://arxiv.org/abs/cond-mat/0603635
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109496
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleElectron-phonon vs. electron-impurity interactions with small electron bandwidths
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