Nitridation of the SiO2/4H–SiC interface studied by surface-enhanced Raman spectroscopy

We employ surface-enhanced Raman spectroscopy (SERS) to investigate the effect of nitridation on interfacial carbon at the SiO2/4H–SiC interface. These results demonstrate that the interfacial carbon clusters are strongly modified by post-nitridation process and the nitrogen take-up correlates with the reduction in the interface state density