Real-space renormalization group study of the Hubbard model on a non-bipartite lattice

被引：142

作者：

Wang, J. X. ^{[1
]}

Kais, Sabre ^{[1
]}

Levine, R. D. ^{[2
]}

机构：

[1] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

[2] Hebrew Univ Jerusalem, Fritz Haber Res Ctr Mol Dynam, IL-91904 Jerusalem, Israel

来源：

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES | 2002年 / 3卷 / 01期

基金：

美国国家科学基金会;

关键词：

Metal-insulator transition; Renormalization group method; Triangular lattice; Quantum dots;

D O I：

10.3390/i3010004

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We present the real-space block renormalization group equations for fermion systems described by a Hubbard Hamiltonian on a triangular lattice with hexagonal blocks. The conditions that keep the equations from proliferation of the couplings are derived. Computational results are presented including the occurrence of a first-order metal-insulator transition at the critical value of U/t approximate to 12.5.

引用

页码：4 / 16

页数：13

共 53 条

[1] ITINERANT THEORY OF FERROMAGNETISM AND HUND'S-RULE COUPLING [J].