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Table 1 XPS core level fitting results and VBM positions

From: Valence band offset of wurtzite InN/SrTiO3 heterojunction measured by x-ray photoelectron spectroscopy

Sample

State

Binding energy(eV)

InN

In 3d 5/2

443.50 ± 0.03

  

444.52 ± 0.03

 

VBM

0.45 ± 0.1

SrTiO3

Ti 2p

458.19 ± 0.03

 

VBM

1.91 ± 0.03

InN/SrTiO3

In 3d 5/2

443.68 ± 0.03

  

444.87 ± 0.03

 

Ti 2p

458.17 ± 0.03

  1. VBMs are obtained by linear extrapolation of the leading edge to the extended base line of the VB spectra.

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