http://www.cnr.it/ontology/cnr/individuo/prodotto/ID1177
Effective electron-phonon coupling and polaronic transition in the presence of strong correlation (Articolo in rivista)
- Type
- Label
- Effective electron-phonon coupling and polaronic transition in the presence of strong correlation (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Alternative label
Barone, P; Raimondi, R; Capone, M; Castellani, C (2006)
Effective electron-phonon coupling and polaronic transition in the presence of strong correlation
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Barone, P; Raimondi, R; Capone, M; Castellani, C (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Univ Roma Tre, Dipartimento Fis E Amaldi, I-00146 Rome, Italy; INFM, SMC, I-00185 Rome, Italy; CNR, Ist Sistemi Complessi, I-00185 Rome, Italy; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy (literal)
- Titolo
- Effective electron-phonon coupling and polaronic transition in the presence of strong correlation (literal)
- Abstract
- We study the Hubbard-Holstein model using slave-boson mean-field and a variational 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. (literal)
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