Polaron band formation in the Holstein model

Preprint

4 March 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9703041

Abstract

We present numerical exact results for the polaronic band structure of the Holstein molecular crystal model in one and two dimensions. The use of 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.

Keywords

PERTURBATION THEORY
NUMERICAL EXACT
POLARONIC BAND
BAND FORMATION
HOLSTEIN MODEL
BAND STRUCTURE
EXACT RESULTS
PHONONS

All Related Versions

Version 1, 1997-03-04, ArXiv
Published version: Physical Review B, 56 (8), 4513.

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