Spectral properties of the small polaron

被引：35

作者：

Robin, JM

机构：

[1] Max-Planck-Institut für Physik komplexer Systeme, D-01187 Dresden

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.56.13634

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We compute exactly both the spectral function of the electron and of the small polaron for the two-site Holstein model in the case where phonon and electron energies are of the same order. We find that for intermediary coupling, the small polaron is a better fundamental excitation of the system than the electron. However, the Lang-Firsov approximation fails to predict accurately the dispersion relation for the small polaron.

引用

页码：13634 / 13637

页数：4

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