Antiferromagnetic Phase Transition in the Quasi-Two-Dimensional Hubbard Model at Half Filling
LIU Qin-Yong1,2 , TIAN Guang-Shan1 , YAN Xin-Zhong2
1 Department of Physics, Peking University, Beijing 100871
2 Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080
Antiferromagnetic Phase Transition in the Quasi-Two-Dimensional Hubbard Model at Half Filling
LIU Qin-Yong1,2 ;TIAN Guang-Shan1 ;YAN Xin-Zhong2
1 Department of Physics, Peking University, Beijing 100871
2 Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080
关键词 ：
75.10.-b ,
71.10.Fd ,
05.50.+q ,
74.25.Ha
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.
Key words ：
75.10.-b
71.10.Fd
05.50.+q
74.25.Ha
出版日期: 2004-05-01
:
75.10.-b
(General theory and models of magnetic ordering)
71.10.Fd
(Lattice fermion models (Hubbard model, etc.))
05.50.+q
(Lattice theory and statistics)
74.25.Ha
(Magnetic properties including vortex structures and related phenomena)
引用本文:
LIU Qin-Yong;TIAN Guang-Shan;YAN Xin-Zhong. Antiferromagnetic Phase Transition in the Quasi-Two-Dimensional Hubbard Model at Half Filling[J]. 中国物理快报, 2004, 21(5): 937-940.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2004/V21/I5/937
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