Superconductivity and Topological Numbers in the Hubbard Chain with Bond-Charge Interaction

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dc.creatorAligia, A. A.
dc.creatorHallberg, K.
dc.creatorBatista, C. D.
dc.creatorOrtiz, G.
dc.date1999-10-12
dc.date.accessioned2026-07-07T03:14:47Z
dc.date.available2026-07-07T03:14:47Z
dc.descriptionWe determine the quantum phase diagram of the Hubbard chain with electron-hole symmetric correlated hopping at 1/2- and 1/4-filling using geometric concepts and continuum limit field theory. The long distance behavior of various correlation functions show a very rich phase diagram with several insulating, metallic, and superconducting phases, which might be relevant to (TMTSF)$_2$X compounds. The closing of charge and spin gaps are accurately resolved as topological transitions (jumps in $π$ of Berry phases). The metallic or insulating character of each thermodynamic phase is obtained from the ground-state expectation value of a displacement operator in reciprocal space.
dc.description5 pages; J. Low Temp. Phys. (in press)
dc.identifierhttps://arxiv.org/abs/cond-mat/9910180
dc.identifierhttp://arxiv.org/abs/cond-mat/9910180
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29808
dc.subjectCondensed Matter
dc.titleSuperconductivity and Topological Numbers in the Hubbard Chain with Bond-Charge Interaction
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