Chin. Phys. Lett.  2004, Vol. 21 Issue (5): 937-940    DOI:
Original Articles |
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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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.
Keywords: 75.10.-b      71.10.Fd      05.50.+q      74.25.Ha     
Published: 01 May 2004
PACS:  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)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I5/0937
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