Many-Polaron States in the Holstein–Hubbard Model

被引：0
|
作者：
Laurent Proville
Serge Aubry
机构：
[1] Universités Paris 7 and Paris 6,Groupe de Physique des Solides, UMR 7588
[2] CEA Saclay,CNRS
来源：
Journal of Statistical Physics | 2002年 / 106卷
关键词：
polaron; bipolaron; Holstein; Hubbard;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A variational approach is proposed to study some properties of the adiabatic Holstein–Hubbard model which describes an assembly of fermionic charges interacting with a static atomic lattice. The sum of the electronic energy and the lattice elastic energy is proved to have minima with a many-polaron structure in a certain domain of model parameters. Our analytical work consists in expanding these energy minima from the zero electronic transfer limit which remarkably holds for a finite amplitude of the onsite Hubbard repulsion and for an unbounded lattice size.
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页码：1185 / 1195
页数：10
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