Charge-density waves in one-dimensional Hubbard superlattices

被引：15

作者：

Paiva, T ^{[1
]}

dos Santos, RR ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.65.153101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the formation of charge density waves (CDW's) in one-dimensional Hubbard superlattices, modeled by a repeated pattern of repulsive (U>0) and free (U=0) sites. By means of Lanczos diagonalizations for the ground state, we calculate the charge structure factor. Our results show that while the superlattice structure affects the modulation of the charge density waves, the periodicity can still be predicted through an effective density. We also show that, for a fixed repulsive layer thickness, the periodicity of the CDW is an oscillatory function of the free layer thickness.

引用

页码：1 / 4

页数：4

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