Open AccessTHERMODYNAMIC PROPERTIES OF THE ONE-DIMENSIONAL EXTENDED HUBBARD MODEL (Ⅱ)——U<0
Author(s) -
Hui Xu,
Kaiyi Zhang
Publication year - 1985
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.34.1433
Subject(s) - hubbard model , physics , magnetic susceptibility , condensed matter physics , specific heat , electron , entropy (arrow of time) , limit (mathematics) , coupling (piping) , thermodynamics , materials science , quantum mechanics , superconductivity , mathematical analysis , mathematics , metallurgy
Entropy, internal energy, specific heat, and magnetic susceptibility of the one-dimensional negative-U extended Hubbard model are computed. An analytical solution of magnetic susceptibility in the strong-coupling (|U|→∞) limit is obtained. Therma-dynamic properties of the system can be discussed in two temperature regions. The high T-region corresponds to decrease in number of double occupied states. The low T-region corresponds to the distribution of electron charge. The effect of W on the-rmodynamic properties is obvious.