NEAR-RESONANT SCATTERING FROM NONSYMMETRIC DIMERS - APPLICATIONS TO SUBSTITUTED POLYANILINES

被引：44

作者：

LAVARDA, FC ^{[1
]}

DOSSANTOS, MC ^{[1
]}

GALVAO, DS ^{[1
]}

LAKS, B ^{[1
]}

机构：

[1] UNESP BAURU,DEPT FIS,BR-17033 BAURU,SP,BRAZIL

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.73.1267

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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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页码：1267 / 1270

页数：4

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