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The Mechanism of Interface State Passivation by NO

Preliminary results of a systematic theoretical study on the reactions of NO with a model 4H-SiC/SiO2 interface are presented. We show, that nitridation is a complex process, in which the balance between various mechanisms depends on doping and temperature. For weakly doped (1015-16 cm-3) n-type SiC, the crucial effect is an additional oxidation without creation of excess carbon at the interface.