1994/06/30 by A. A. Aligia, Aligia, A. A., L. Arrachea +1 · 1 citation
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9406122
10 pages, no figures, LATEX, CNEA-CAB 3305
arxiv created 1994/06/30 · arxiv updated 2009/11/30
We obtain the exact solution of a general Hubbard chain with kinetic energy t, bond-charge interaction X and on-site interaction U with the only restriction t = X. At zero temperature and half filling, the model exhibits a Mott transition at U = 4t. In the metallic phase and near half filling, superconducting states are part of the degenerate ground state and are favored for small U if the system is slightly perturbed.