Two generalizations of η pairing in extended Hubbard models -: art. no. 012512

被引：10
|
作者：
Zhai, H [1 ]
机构：
[1] Tsinghua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
来源：
PHYSICAL REVIEW B | 2005年 / 71卷 / 01期
关键词：
D O I：
10.1103/PhysRevB.71.012512
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Hubbard model in bipartite lattice has been rigorously proved to have eta-paired states as eigenstates by C. N. Yang [Phys. Rev. Lett. 63, 2144 (1989)]. In this paper, this result is first generalized to a triangular lattice and then even to an arbitrary lattice structure. We also consider its generalization to higher-spin Hubbard models. The conditions under which these models have eta-paired states as eigenstates were obtained.
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