Surface excitons in mixed molecular crystals
1979; American Institute of Physics; Volume: 70; Issue: 4 Linguagem: Inglês
10.1063/1.437692
ISSN1520-9032
Autores Tópico(s)Organic and Molecular Conductors Research
ResumoA theory of surface excitons in mixed molecular crystals is presented by extending the coherent potential approximation developed in the study of an infinite bulk crystal to a suitable one for a semi-infinite crystal. The effect of the semi-infinite nature of the crystal is taken into account by a localized perturbation method. The surface coherent potential is introduced to calculate the concent ration dependence of the energy of the surface excitons. The results give a qualitative explanation of the recent observation of surface excitons in the mixed crystal system antheracene–perdeuteroanthracene.
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