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.

Phase separation and pairing regimes in the one-dimensional asymmetric Hubbard model

DALMONTE, MARCELLO;DEGLI ESPOSTI BOSCHI, CRISTIAN;ERCOLESSI, ELISA;ORTOLANI, FABIO
2010

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.
L. Barbiero; M. Casadei; M. Dalmonte; C. Degli Esposti Boschi; E. Ercolessi; F. Ortolani
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/90345
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