Polaron band formation in the Holstein model

被引：140

作者：

Wellein, G

Fehske, H

机构：

[1] Physikalisches Institut, Universität Bayreuth

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.56.4513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present numerical exact results for the polaronic band structure of the Holstein molecular crystal model in one and two dimensions. The use of a direct Lanczos diagonalization technique, preserving the full dynamics and quantum nature of phonons, allows us to analyze in detail the renormalization of both quasiparticle bandwidth and dispersion by the electron-phonon interaction. For the two-dimensional case some of our exact data are compared with the results obtained in the framework of a recently developed finite-cluster strong-coupling perturbation theory.

引用

页码：4513 / 4517

页数：5

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