Near resonant scattering from nonsymmetric dimers: Applications to substituted polyanilines

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1994-01-01

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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. © 1994 The American Physical Society.

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Physical Review Letters, v. 73, n. 9, p. 1267-1270, 1994.

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