The Gutzwiller wave function for a strongly correlated model can, if supplemented with a long-range Jastrow factor, provide a proper variational description of Mott insulators, so far unavailable. We demonstrate this concept in the prototypical one-dimensional t-t(') Hubbard model, where at half-filling we reproduce all known phases, namely, the ordinary Mott undimerized insulator with power-law spin correlations at small t(')/t, the spin-gapped metal above a critical t(')/t and small U, and the dimerized Mott insulator at large repulsion.

Variational description of Mott insulators: the case of the t-t' one-dimensionalHubbard model / Capello, M; Becca, Federico; Fabrizio, Michele; Sorella, Sandro; Tosatti, Erio. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 94:2(2005), pp. 026406.1-026406.4. [10.1103/PhysRevLett.94.026406]

Variational description of Mott insulators: the case of the t-t' one-dimensionalHubbard model

Becca, Federico;Fabrizio, Michele;Sorella, Sandro;Tosatti, Erio
2005-01-01

Abstract

The Gutzwiller wave function for a strongly correlated model can, if supplemented with a long-range Jastrow factor, provide a proper variational description of Mott insulators, so far unavailable. We demonstrate this concept in the prototypical one-dimensional t-t(') Hubbard model, where at half-filling we reproduce all known phases, namely, the ordinary Mott undimerized insulator with power-law spin correlations at small t(')/t, the spin-gapped metal above a critical t(')/t and small U, and the dimerized Mott insulator at large repulsion.
2005
94
2
1
4
026406
http://link.aps.org/doi/10.1103/PhysRevLett.94.026406
https://arxiv.org/abs/cond-mat/0403430
Capello, M; Becca, Federico; Fabrizio, Michele; Sorella, Sandro; Tosatti, Erio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16086
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