Effective electron-phonon coupling and polaronic transition in the presence of strong correlation

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dc.creatorBarone, P.
dc.creatorRaimondi, R.
dc.creatorCapone, M.
dc.creatorCastellani, C.
dc.date2005-09-05
dc.date2006-03-07
dc.date.accessioned2026-07-07T08:22:26Z
dc.date.available2026-07-07T08:22:26Z
dc.descriptionWe study the Hubbard-Holstein model using slave-boson mean-field and a variation al Lang-Firsov transformation. We identify weak and strong e-ph coupling solutions, whose stability depends both on the bare e-ph coupling and on the correlation strength. At mean field level the evolution from weak to strong electron-phonon coupling occurs via a first-order polaronic transition if the adiabatic parameter is below a critical value. In the strongly correlated regime and in the adiabatic limit, the region in which the weak-coupling solution is stable is sizeably enlarged with respect to the weakly correlated system and the Mott metal-insulator transition is found to be robust with respect to e-ph interaction.
dc.description6 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0509090
dc.identifierhttp://arxiv.org/abs/cond-mat/0509090
dc.identifierPhys. Rev. B 73, 085120 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.085120
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/135650
dc.subjectStrongly Correlated Electrons
dc.titleEffective electron-phonon coupling and polaronic transition in the presence of strong correlation
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