CRIS Current Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishWe address some open questions regarding the phase diagram of the one-dimensional Hubbard model with asymmetric hopping coefficients and balanced species. In the attractive regime we present a numerical study of the passage from on-site pairing dominant correlations at small asymmetries to charge-density waves in the region with markedly different hopping coefficients. In the repulsive regime we exploit two analytical treat- ments in the strong- and weak-coupling regimes in order to locate the onset of phase separation at small and large asymmetries, respectively.
| Titolo: | Phase separation and pairing regimes in the one-dimensional asymmetric Hubbard model |
| Autore/i: | L. Barbiero; M. Casadei; DALMONTE, MARCELLO; DEGLI ESPOSTI BOSCHI, CRISTIAN; ERCOLESSI, ELISA; ORTOLANI, FABIO |
| Autore/i Unibo: | |
| Anno: | 2010 |
| Rivista: | |
| Digital Object Identifier (DOI): | 10.1103/PhysRevB.81.224512 |
| Abstract: | We address some open questions regarding the phase diagram of the one-dimensional Hubbard model with asymmetric hopping coefficients and balanced species. In the attractive regime we present a numerical study of the passage from on-site pairing dominant correlations at small asymmetries to charge-density waves in the region with markedly different hopping coefficients. In the repulsive regime we exploit two analytical treat- ments in the strong- and weak-coupling regimes in order to locate the onset of phase separation at small and large asymmetries, respectively. |
| Data prodotto definitivo in UGOV: | 2010-06-24 16:55:58 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11585/90345
Copyright © 2018