Electron-phonon interaction for adiabatic anharmonic phonons

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dc.creatorZiegler, K.
dc.creatorSchneider, D.
dc.date2005-04-26
dc.date2005-09-20
dc.date.accessioned2026-07-07T06:18:16Z
dc.date.available2026-07-07T06:18:16Z
dc.descriptionA model with Holstein-like electron-phonon coupling is studied in the limit of adiabatic phonons. The phonon distribution is anharmonic with two degenerate maxima. This model can be related to fermions in a correlated binary alloy and describes microscopic phase separation. We discuss the weak and strong electron-phonon coupling limit and present a qualitative phase diagram. In terms of the phononic displacements it consists of a homogeneous, an alternating, and a disordered phase. There is a first order phase transition between the homogeneous and the alternating phase, and second order phase transition between the alternating and the disordered phase. The opening of a gap inside the disordered phase is treated by a dynamical mean-field theory.
dc.description11 pages, 3 figures, revised and published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0504688
dc.identifierhttp://arxiv.org/abs/cond-mat/0504688
dc.identifierJ. Phys.: Condens. Matter 17, 5489-5497 (2005)
dc.identifierdoi:10.1088/0953-8984/17/36/005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/94682
dc.subjectStrongly Correlated Electrons
dc.titleElectron-phonon interaction for adiabatic anharmonic phonons
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