PAIRING IN THE HOLSTEIN MODEL IN THE DILUTE LIMIT

被引：121

作者：

MARSIGLIO, F ^{[1
]}

机构：

[1] MCMASTER UNIV, DEPT PHYS & ASTRON, HAMILTON, ON L8S 4M1, CANADA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1995年 / 244卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00046-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Holstein model in one dimension is examined using a variety of techniques, i.e. exact diagonalization, perturbation theory, and the adiabatic approximation. In agreement with other authors we find that the model is polaronic for all coupling strengths. In the case of two electrons we examine the regimes under which binding occurs. We find that binding decreases as the phonon frequency increases, for a given coupling strength. We provide a numerical verification for the effect of retardation, which gives rise to the well-known pseudopotential effect.

引用

页码：21 / 34

页数：14

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