Surface metal-insulator transition in the Hubbard model

被引：147
|
作者：
Potthoff, M [1 ]
Nolting, W [1 ]
机构：
[1] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany
来源：
PHYSICAL REVIEW B | 1999年 / 59卷 / 04期
关键词：
D O I：
10.1103/PhysRevB.59.2549
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The correlation-driven metal-insulator (Mott) transition at a solid surface is studied within the Hubbard model for a semi-infinite lattice by means of the dynamical mean-field theory. The transition takes place at a unique critical strength of the interaction. Depending on the surface geo-metry, the interaction strength, and the wave vector, we find one-electron excitations in the coherent part of the surface-projected metallic spectrum, which are confined to two dimensions. [S0163-1829(99)04904-8].
引用
收藏
页码：2549 / 2555
页数：7
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