Gutzwiller scheme for electrons and phonons: The half-filled Hubbard-Holstein model (Articolo in rivista)

Type
Label
  • Gutzwiller scheme for electrons and phonons: The half-filled Hubbard-Holstein model (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Barone, P; Raimondi, R; Capone, M; Castellani, C; Fabrizio, M (2008)
    Gutzwiller scheme for electrons and phonons: The half-filled Hubbard-Holstein model
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barone, P; Raimondi, R; Capone, M; Castellani, C; Fabrizio, M (literal)
Pagina inizio
  • 23511 (literal)
Pagina fine
  • [10] (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 77 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • fasc. (23). American Physical Society (APS). (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Barone, P.; Fabrizio, M.] SISSA, Int Sch Adv Studies, I-34014 Trieste, Italy; [Barone, P.; Fabrizio, M.] CNR INFM Democritos Natl Simulat Ctr, I-34014 Trieste, Italy; [Raimondi, R.] Univ Roma Tre, CNISM, I-00146 Rome, Italy; [Raimondi, R.] Univ Roma Tre, Dipartimento Fis E Amaldi, I-00146 Rome, Italy; [Capone, M.; Castellani, C.] Univ Roma La Sapienza, CNR INFM, SMC, I-00185 Rome, Italy; [Capone, M.; Castellani, C.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; [Capone, M.] ISC CNR, I-00185 Rome, Italy (literal)
Titolo
  • Gutzwiller scheme for electrons and phonons: The half-filled Hubbard-Holstein model (literal)
Abstract
  • We analyze the ground-state properties of strongly correlated electrons coupled with phonons by means of a generalized Gutzwiller wave function, which includes phononic degrees of freedom. We study in detail the paramagnetic half-filled Hubbard-Holstein model, where the electron-electron interaction can lead to a Mott transition and the electron-phonon coupling to a bipolaronic transition. We critically discuss the quality of the proposed wave function in describing the various transitions and crossovers that occur as a function of the parameters. Previous variational attempts are recovered as particular choices of the wave function, while keeping all the variational freedom allows to access regions of the phase diagram, otherwise inaccessible within previous variational approaches. (literal)
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