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Core level Mg spectra recorded on MgO (a) and (e) samples, In spectra on InN (c) and (f) samples, and VB spectra for MgO (b) and InN (d) samples. All peaks have been fitted to the Voigt line shapes using a Shirley background, and the VBM values are determined by linear extrapolation of the leading edge to the base line.
Schematic energy band diagram of heterojunction. A type-I heterojunction is formed in the straddling arrangement.
XPS CL spectra fitting results and VBM positions obtained by linear extrapolation of the leading edge to the extended base line of the VB spectra.
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