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Electronic and Optical Properties of Conjugated Polymers$
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William Barford

Print publication date: 2013

Print ISBN-13: 9780199677467

Published to Oxford Scholarship Online: May 2013

DOI: 10.1093/acprof:oso/9780199677467.001.0001

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Electron-nuclear coupling I: Noninteracting electrons

Electron-nuclear coupling I: Noninteracting electrons

Chapter:
(p.44) 4 Electron-nuclear coupling I: Noninteracting electrons
Source:
Electronic and Optical Properties of Conjugated Polymers
Author(s):

William Barford

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199677467.003.0004

The effect of electron-nuclear coupling in π‐conjugated systems is described in the limit of noninteracting electrons. The Peierls mechanism that leads to a semiconducting behaviour and to bond alternation is explained. Next, the fundamental excitations, e.g. solitons and mid-gap states – that are associated with reversals of the bond alternation – are described. Charge-polarons are also described with the aid of the Holstein model.

Keywords:   electron-nuclear coupling, Peierls transition, bond alternation, solitons, polarons, Holstein model

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