Abstract
The physics of core excitons in semiconductors is reviewed, with emphasis on the fact that Hjalmarson-Frenkel ‘deep’ core excitons are observed, and co-exist with Wannier-Mott ‘shallow’ excitons which are not normally resolved experimentally. The theory of Hjalmarson-Frenkel excitons is extended to excitons in superlattices, and the Ga3d core exciton in GaAs 1-x P x /GaP strained-layer superlattices is predicted to change from a resonance in the conduction band (with apparent negative binding energy) to a bound state in the gap (positive binding energy), as the GaAs 1-x P x layer thickness decreases.
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Dow, J.D., Shen, J., Ren, S.Y. (1989). Core Excitons in Strained-Layer Superlattices. In: Doni, E., Girlanda, R., Parravicini, G.P., Quattropani, A. (eds) Progress in Electron Properties of Solids. Physics and Chemistry of Materials with Low-Dimensional Structures, vol 10. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2419-2_33
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DOI: https://doi.org/10.1007/978-94-009-2419-2_33
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