Hamburg 2001 – wissenschaftliches Programm

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SYOF: Organische Festkörper

SYOF 5: Poster Session

SYOF 5.1: Poster

Dienstag, 27. März 2001, 17:00–19:00, Aula S3

Dimerization and solitons of trans-polyacetylene in strong longitudinal electric fields — •Stefan-Ludwig Drechsler¹, Gernot Paasch¹, and Jiri Malek² — ¹IFW-Dresden e.V., P.O.Box 270016, D-01171 Dresden, Germany — ²Innst. of Physics of the Czech Acad. of Sciences, Prague, Czech Rep.

The effect of strong longitudinal and transversal electric fields on the dimerization amplitude and the formation energy of solitonic excitations is considered by exact diagonalization studies within the self-consistent adiabatic approximation for the extended Peierls-Hubbard-model applied to chains with zig-zag chain geometry. The interplay of intermediadetely strong electron-electron and electron-lattice interactions and homogeneous as well as inhomogeneous external electric fields near metal-polymer interfaces are considered. Possible implications for devices based on conjugated polymers are discussed.