Antiferromagnetic Phase Transition in the Quasi-Two-Dimensional Hubbard Model at Half Filling
Liu Qin-Yong, Tian Guang-Shan, Xin-Zhong Yan
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.
Chinese Physics Letters•May 1, 2004•3 citations