NEAR-RESONANT SCATTERING FROM NONSYMMETRIC DIMERS - APPLICATIONS TO SUBSTITUTED POLYANILINES
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Data
1994-08-29
Autores
Lavarda, Francisco Carlos [UNESP]
Dossantos, M. C.
Galvao, D. S.
Laks, B.
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American Physical Soc
Resumo
In this work we show that, beyond the prediction of the random dimer model [Wu and Phillips, Phys. Rev. Lett. 66, 1366 (1991)], it is possible to have near resonant scattering from nonsymmetric dimers. It is shown by direct density of states calculations as well as by a procedure similar to the random dimer model that protonated chains of alkyl-substituted polyanilines support extended electronic states at the Fermi energy when a disordered distribution of symmetric or asymmetric bipolarons is present. An extension of the random dimer model to include resonant scattering by nonsymmetric dimers is proposed.
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Physical Review Letters. College Pk: American Physical Soc, v. 73, n. 9, p. 1267-1270, 1994.