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    题名: Exact magnetic phase diagram of the one-dimensional Hubbard model
    作者: 楊棨;Yang, Chi;Kocharian, A. N.;Chiang, Y. L.
    贡献者: 淡江大學物理學系
    关键词: Hubbard model;Superconductivity;Magnetic transitions;Phase diagrams
    日期: 2000-06-01
    上传时间: 2009-12-31 10:39:29 (UTC+8)
    出版者: Elsevier
    摘要: The exact solution of the one-dimensional Hubbard model, both attractive and repulsive, is investigated numerically over a wide range of interaction strength U/t (−∞<U/t<∞), electron concentration n (0⩽n⩽1) and magnetic field h. The magnetic phase diagram and the ground-state properties, including the total energy, the average spin (magnetization) and the spin (magnetic) susceptibility are studied under the variation of U/t, h/t and n. The critical behavior near the onset of magnetization and magnetic saturation is analyzed. Our results are in full agreement with the analytical expansions in strong and weak interaction limits and previous numerical studies for h=0.
    關聯: Physica B: Condensed Matter 281-282, pp.831-833
    DOI: 10.1016/S0921-4526(99)01156-4
    显示于类别:[物理學系暨研究所] 期刊論文


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