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

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

2010-01-28

arxiv.org/abs/1001.5226v3

Phys. Rev. B 81, 224512 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, RevTeX 4, 12 eps figures, some additional refs. with respect to v1 and citation errors fixed

Scientific paper

10.1103/PhysRevB.81.224512

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 treatments in the strong- and weak-coupling regimes in order to locate the onset of phase separation at small and large asymmetries respectively.

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