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    題名: Thermodynamic properties of one-dimensional Hubbard model at finite temperatures
    作者: 楊棨;Yang, C.;Kocharian A. N.;Chiang, Y. L.
    貢獻者: 淡江大學物理學系
    日期: 2003-08-10
    上傳時間: 2009-12-31 10:13:09 (UTC+8)
    出版者: World Scientific Publishing
    摘要: The phase diagram and thermodynamic properties of the Hubbard model in one dimension are calculated numerically within the generalized self-consistent approach over a wide range of temperature T, magnetic field h, interaction strength U/t and electron concentration n. The temperature variation of the transverse magnetization, double occupied sites and chemical potential at various n, U/t and h is also analyzed. The wave vector q for the magnetic order parameter in the vicinity of the half-filling in the metallic phase shows a crossover from incommensurate magnetic phase (0<q<π) into the state with strong antiferromagnetic correlations (q=π) as temperature is increased. Overall our numerical results in the approximate theory at finite temperatures are in good quantitative and qualitative agreement with the Bethe-ansatz results.
    關聯: International Journal of Modern Physics B 17(18-20), pp.3354-3358
    DOI: 10.1142/S0217979203020971
    顯示於類別:[物理學系暨研究所] 期刊論文

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