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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): | http://dx.doi.org/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 |
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http://hdl.handle.net/11585/90345
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