Effects of the second and third neighbor hopping interactions on the electronic states of soliton in polyacetylene View Full Text


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Article Info

DATE

1993-06

AUTHORS

Z. J. Li, Z. An, K. L. Yao, Z. G. Li

ABSTRACT

We have studied the energy spectra and the electronic states of a soliton in the weakly coupled electron-phonon systems using an extension of SSH model that includes non-nearest neighbor hopping interactions. The results show that: (1) the electron-hole symmetry of the energy band structure implied by SSH model is broken, and the energy gap 2Δ increases. (2) for a negative charged soliton, only two bound states have been found, one of them is the midgap state, another is a new shallow state near the bottom of the conduction band; for a neutral soliton, all three bound states exist as in the SSH model, but their localizations are strengthened; for a positive charged soliton, four bound states have been found, one of which is an additional state near the top of the conduction band. More... »

PAGES

195-197

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01312177

DOI

http://dx.doi.org/10.1007/bf01312177

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1026172730


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