Metal-insulator transition in the Hubbard model

被引:8
|
作者
Bulla, R
Pruschke, T
Hewson, AC
机构
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
[3] Univ London Imperial Coll Sci Technol & Med, Dept Mat Sci, London SW7 2BZ, England
关键词
metal-insulator transition; numerical renormalization group method; Hubbard model;
D O I
10.1016/S0921-4526(98)00719-4
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The scaling behaviour of the dynamical properties near the metal-insulator transition in the finite-dimensional Hubbard model is studied via Wilson's numerical renormalization group method, after using the standard mapping into an effective Anderson impurity model. The very low frequency form of the Green's function and the self-energy scales with the quasiparticle weight Z. On approaching the metal-insulator transition, a two peak structure in the imaginary part develops which goes over to the pole at zero frequency in the insulating regime. The positions of this two peaks scale as Z(1/2). (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:721 / 722
页数:2
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