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Doping-dependence of subband energies in quantized electron accumulation at InN surfaces
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Veal, T. D. (Tim D.), Piper, L. F. J., Phillips, M. R., Zareie, M. H., Lu, Hai, Schaff, W. J. and McConville, C. F. (Chris F.). (2007) Doping-dependence of subband energies in quantized electron accumulation at InN surfaces. Physica Status Solidi (a), Vol.204 (No.2). pp. 536-542. ISSN 0031-8965
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Official URL: http://dx.doi.org/10.1002/pssa.200673226
Abstract
Electron tunnelling spectroscopy is used to investigate the quantized electron accumulation at the surfaces of wurtzite InN with different doping levels. The tunnelling spectra of InN-oxide-tip junctions recorded in air at room temperature exhibit a similar to 0.6 V plateau, corresponding to the band gap of InN, and a gap between onsets of 1.3 V, consistent with the separation between the valence band maximum and the pinned Fermi level at the oxidized InN surface. Also observed within the tunnelling spectra are additional features between the conduction band minimum and the pinned Fermi level. These features are attributed to surface-bound quantized states associated with the potential well formed by the downward band bending at the InN-oxide interface. Their energetic positions are dependent upon the doping level of the InN films and coincide with calculated subband energies. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
| Item Type: | Journal Article |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Physica Status Solidi (a) |
| Publisher: | Wiley - VCH Verlag GmbH & Co. KGaA |
| ISSN: | 0031-8965 |
| Date: | February 2007 |
| Volume: | Vol.204 |
| Number: | No.2 |
| Number of Pages: | 7 |
| Page Range: | pp. 536-542 |
| Identification Number: | 10.1002/pssa.200673226 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Title of Event: | 2nd International Workshop on Modulation Spectroscopy of Semiconductor Structures |
| Type of Event: | Other |
| Location of Event: | Wroclaw, Poland |
| Date(s) of Event: | June 29-July 01, 2006 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/32335 |
Data sourced from Thomson Reuters' Web of Knowledge
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