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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 II: Interacting electrons

Electron-nuclear coupling II: Interacting electrons

(p.101) 7 Electron-nuclear coupling II: Interacting electrons
Electronic and Optical Properties of Conjugated Polymers

William Barford

Oxford University Press

The effect of electron-nuclear coupling in π‐conjugated systems is described in the limit of interacting electrons via the Pariser-Parr-Pople-Peierls model. It is shown that electron-electron interactions change the nature of the ground and excited states described in Chapter 4. In particular, the groundstate bond alternation is enhanced, the 2Ag state becomes a complex four-soliton excitation, and the 1Bu state is an exciton-polaron The chapter concludes with a description of the role of nuclear quantum fluctuations in destroying the Peierls dimerized phase.

Keywords:   electron-nuclear coupling, electron-electron interactions, solitons, exciton-polaron, nuclear quantum fluctuations, Peierls phase

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