Thermodynamic properties of one-dimensional Hubbard model at finite temperatures

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/27505

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题名:	Thermodynamic properties of one-dimensional Hubbard model at finite temperatures
作者:	楊棨;Yang, C.;Kocharian A. N.;Chiang, Y. L.
贡献者:	淡江大學物理學系
日期:	2003-08-10
上传时间:	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
显示于类别:	[物理學系暨研究所] 期刊論文

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