EXACT RESULTS FOR A HUBBARD CHAIN WITH LONG-RANGE HOPPING

被引:73
|
作者
GEBHARD, F
RUCKENSTEIN, AE
机构
[1] Serin Physics Laboratory, Rutgers University, Piscataway, NJ 08855-0849
关键词
D O I
10.1103/PhysRevLett.68.244
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We give the exact spectrum and thermodynamics for a long-range hopping Hubbard chain with linear dispersion. This model exhibits a Mott-Hubbard metal-insulator transition at half filling when the interaction strength U equals the bandwidth W. The solution for U >> W also covers the corresponding t-J model, which reduces to the spin model of Haldane and Shastry at half filling. We mention possible extensions of the model in one and higher dimensions.
引用
收藏
页码:244 / 247
页数:4
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