MOTT-HUBBARD METAL-INSULATOR-TRANSITION IN NONBIPARTITE LATTICES

被引：95

作者：

KRISHNAMURTHY, HR

JAYAPRAKASH, C

SARKER, S

WENZEL, W

机构：

[1] PRINCETON UNIV,JOSEPH HENRY LABS PHYS,PRINCETON,NJ 08544

[2] OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210

[3] UNIV ALABAMA,DEPT PHYS,TUSCALOOSA,AL 35486

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.64.950

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We reinterpret the Hubbard model in terms of doubly occupied sites and empty sites with an attractive interaction U whose pairing leads to the Mott-Hubbard transition. We develop a mean-field theory for this pairing which in a triangular lattice at T=0 leads to a first-order transition from a spiral, incommensurate metal to a commensurate insulator at U5.27t where a charge gap (0.085t) opens up. We also discuss the effect of fluctuations. © 1990 The American Physical Society.

引用

页码：950 / 953

页数：4

共 16 条

[1] AN APPROXIMATE QUANTUM THEORY OF THE ANTIFERROMAGNETIC GROUND STATE [J].