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Antiferromagnetic Phase Transition in the Quasi-Two-Dimensional Hubbard Model at Half Filling |
| LIU Qin-Yong1,2;TIAN Guang-Shan1;YAN Xin-Zhong2 |
| 1Department of Physics, Peking University, Beijing 100871
2Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080 |
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| Cite this article: |
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LIU Qin-Yong, TIAN Guang-Shan, YAN Xin-Zhong 2004 Chin. Phys. Lett. 21 937-940 |
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Abstract We study the antiferromagnetic phase transition in the quasi-two-dimensional Hubbard model at half filling for a wide range of the Coulomb interaction U. By using the fluctuation-exchange approximation, we calculate the Néel transition temperature of the system as a function of the Coulomb interaction U. For weak-to-intermediate Coulomb interactions, the present calculation provides a reasonable result for the Néel temperature.
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| Keywords:
75.10.-b
71.10.Fd
05.50.+q
74.25.Ha
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Published: 01 May 2004
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| PACS: |
75.10.-b
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(General theory and models of magnetic ordering)
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71.10.Fd
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(Lattice fermion models (Hubbard model, etc.))
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05.50.+q
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(Lattice theory and statistics)
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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