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arXiv:cond-mat/0111360 · The European Physical Journal B

Low temperature properties of one-dimensional SU(4) Hubbard-like model at low concentration

Shi-Jian Gu, You‐Quan Li, Zu‐Jian Ying

Published May 1, 2003• 0 citations
arXivHTMLPDF
DOI
10.1140/epjb/e2003-00151-2

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The magnetic susceptibility at absolute-zero temperature for the one-dimensional Hubbard model is studied exactly as a function of the concentration of electrons by using Lieb and Wu's theory for this system. Our analysis essentially follows Griffiths's method for the magnetic susceptibility of the one-dimensional Heisenberg antiferromagnet, and is a generalization of Takahashi's calculation to the systems with an arbitrary concentration of electrons. The ground-state energy and the magnitude of local moments at each site are also studied. Combined with the results on the susceptibility, they should suggest how the effect of the Coulomb interaction on the properties of the system at low temperatures changes with the concentration of electrons.