Applied Physics Letters · 2002 · 73 citations · 10 references
Natural SciencesChemistryPhysicsCondensed Matter PhysicsSolid State PhysicsSolid-state ChemistryCrystal ChemistryElectronic Band StructureElectronic SpectroscopyElectronic StructureElectronic Structure Of SolidsAbsorption Line SpectroscopyGround State PropertiesOxygen VacanciesOxygen Vacancy ChemistryVacancy ComplexesVibrational Energy Levels
It is argued that the vacancy–oxygen (VO) complex (A center) in Ge has three charge states: double negative, single negative, and neutral. Corresponding energy levels are located at Ec−0.21 eV (VO−−/−) and Ev+0.27 eV (VO−/0). An absorption line at 716 cm−1 has been assigned to the asymmetrical stretching vibration mode of the doubly negatively charged VO complex.
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