Direct observation of defect levels in InN by soft X-ray absorption spectroscopy.
We have used synchrotron-based near-edge X-ray absorption fine structure (NEXAFS) spectroscopy to study the electronic structure of nitrogen-related defects in InN(0001). Several defect levels within the band gap or the conduction band of InN were clearly resolved in NEXAFS spectra around the nitrogen K-edge. We attribute the level observed at 0.3 eV below the conduction band minimum (CBM) to interstitial nitrogen, the level at 1.7 eV above the CBM to antisite nitrogen, and a sharp resonance at 3.2 eV above the CBM to molecular nitrogen, in full agreement with theoretical simulations.
Petravic
M
M
Deenapanray
P N K
PN
Fraser
M D
MD
Soldatov
A V
AV
Yang
Y-W
YW
Anderson
P A
PA
Durbin
S M
SM