LARGE-U HUBBARD-MODEL - THE CROSSOVER FROM ONE DIMENSION TO 2 DIMENSIONS

被引：4

作者：

WENG, ZY ^{[1
]}

SHENG, DN ^{[1
]}

TING, CS ^{[1
]}

机构：

[1] UNIV HOUSTON,TEXAS CTR SUPERCONDUCT,HOUSTON,TX 77204

来源：

PHYSICS LETTERS A | 1993年 / 175卷 / 06期

关键词：

D O I：

10.1016/0375-9601(93)91000-U

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The anisotropic two-dimensional (2D) large-U Hubbard model as an assembly of parallel chains has been studied. Based on the analytical understanding of the Hubbard chain, the charge and spin separation is shown to persist into 2D and the holon is turned into a semion by attaching a half-quantized flux. The confinement of holon and spinon will block interchain coherent hopping of single holons and the coherent interchain motion is found to originate from the pair hoppings of holons. The mean-field states of the semionic Hamiltonian for holons and the implication for the isotropic 2D case are discussed.

引用

页码：455 / 460

页数：6

共 20 条

[1]

Anderson P. W., 1990, International Journal of Modern Physics B, V4, P181, DOI 10.1142/S0217979290000115

[2] CONFINEMENT IN THE ONE-DIMENSIONAL HUBBARD-MODEL - IRRELEVANCE OF SINGLE-PARTICLE HOPPING [J].