Multimode vibronic spectra of the Holstein molecular crystal model

Multimode vibronic spectra of the Holstein molecular crystal model

Vibronic spectra of the Holstein model for molecular crystals are investigated using the dynamical mean field theory with the additional aid of the multi-mode Brownian oscillator model. The effects of temperature, intermolecular transfer integral, damping constant and quadratic coupling on the vibro...

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Bibliographic Details
Main Authors: Liu, Qingmei, Ye, Jun, Zhao, Yang
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2011
Subjects:
DRNTU::Science::Physics::Atomic physics::Properties of matter and antimatter
Online Access:https://hdl.handle.net/10356/90391
http://hdl.handle.net/10220/6736
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Institution: Nanyang Technological University
Language: English
Description
Summary:Vibronic spectra of the Holstein model for molecular crystals are investigated using the dynamical mean field theory with the additional aid of the multi-mode Brownian oscillator model. The effects of temperature, intermolecular transfer integral, damping constant and quadratic coupling on the vibronic spectra are examined, and spectra in the presence of two phonon modes are studied in detail. Results from the dynamical mean field theory are corroborated by those from the multi-mode Brownian oscillator model. Strength and weakness of the two approaches are discussed to point out the corresponding regimes of application for each.

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