Ground state and excitations in polyacetylene chains

While a nearest-neighbor-only Su-Schrieffer-Heeger model cannot distinguish {ital cis}- from {ital trans}-polyacetylene, a simple extension which includes a third-neighbor interaction can. This extended model gives a nondegenerate {ital cis} structure with a larger band gap and a smaller cohesive en...

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Bibliographische Detailangaben

Veröffentlicht in:	Physical Review, B: Condensed Matter B: Condensed Matter, 1996-07, Vol.54 (3), p.1735-1740
Hauptverfasser:	Pfeiffer, RS, Yoder, G, Chen, A
Format:	Artikel
Sprache:	eng
Schlagworte:	BAND THEORY CHAINS ENERGY GAP EXCITED STATES GROUND STATES PHYSICS POLARONS POLYACETYLENES
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