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dc.contributor.authorClay, R. Torstenen_US
dc.contributor.authorSandvik, Anders W.en_US
dc.contributor.authorCampbell, David K.en_US
dc.date.accessioned2009-04-13T18:52:34Z
dc.date.available2009-04-13T18:52:34Z
dc.date.issued1998-10-01
dc.identifier.citation1998. "Possible Exotic Phases in the One-Dimensional Extended Hubbard Model," cond-mat/9810010. http://arxiv.org/abs/cond-mat/9810010
dc.identifier.otherPhys. Rev. B 59, 4665 (1999)
dc.identifier.urihttp://arxiv.org/abs/cond-mat/9810010
dc.identifier.urihttps://hdl.handle.net/2144/985
dc.description.abstractWe investigate numerically the ground state phase diagram of the one-dimensional extended Hubbard model, including an on--site interaction U and a nearest--neighbor interaction V. We focus on the ground state phases of the model in the V >> U region, where previous studies have suggested the possibility of dominant superconducting pairing fluctuations before the system phase separates at a critical value V=V_PS. Using quantum Monte Carlo methods on lattices much larger than in previous Lanczos diagonalization studies, we determine the boundary of phase separation, the Luttinger Liquid correlation exponent K_rho, and other correlation functions in this region. We find that phase separation occurs for V significantly smaller than previously reported. In addition, for negative U, we find that a uniform state re-enters from phase separation as the electron density is increased towards half filling. For V < V_PS, our results show that superconducting fluctuations are not dominant. The system behaves asymptotically as a Luttinger Liquid with K_rho < 1, but we also find strong low-energy (but gapped) charge-density fluctuations at a momentum not expected for a standard Luttinger Liquid.en_US
dc.relation.ispartofcond-mat/9810010
dc.titlePossible Exotic Phases in the One-Dimensional Extended Hubbard Modelen_US
dc.typeArticleen_US


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