Polaron features of the one-dimensional Holstein molecular crystal model

被引：36

作者：

Cataudella, V ^{[1
]}

De Filippis, G ^{[1
]}

Iadonisi, G ^{[1
]}

机构：

[1] Univ Naples, Dipartimento Sci Fisiche, I-80125 Naples, Italy

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.62.1496

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The polaron features of the one-dimensional Holstein model are investigated by improving a variational method introduced recently and based on a Linear superposition of Bloch states that describe large and small polaron wave functions. The mean number of phonons, the polaron kinetic energy, the electron-phonon local correlation function, and the ground-state spectral weight are calculated and discussed. A crossover regime between large and small polarons for any value of the adiabatic parameter omega(0)/t is found and a polaron phase diagram is proposed.

引用

页码：1496 / 1499

页数：4

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