Electronic structure of spinel |
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Authors: | GE Harlow TJ Shankland |
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Institution: | Department of Geological Sciences, Harvard University, Cambridge, Massachusetts 02138, U.S.A. |
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Abstract: | The fundamental band gap between conduction and valence bands in aluminate spinels has been found to be at least 8·1 eV; the optical reflectivity peak at this energy possibly represents the lowest-energy exciton. In crystals with non-stoichiometric Al/Mg ratios, the intensity of this first reflection peak appears to decrease with increasing Al/Mg ratio; however, the peak energies themselves are essentially independent of stoichiometry. It seems likely that spinel and olivine in spinel-structure will have electronic transport behavior similar to that of olivine in its normal structure. |
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