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Nonparabolic coupled Poisson-Schrodinger solutions for quantized electron accumulation layers : Band bending, charge profile, and subbands at InN surfaces
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King, P. D. C., Veal, T. D. (Tim D.) and McConville, C. F. (Chris F.) (2008) Nonparabolic coupled Poisson-Schrodinger solutions for quantized electron accumulation layers : Band bending, charge profile, and subbands at InN surfaces. Physical Review B (Condensed Matter and Materials Physics), Vol.77 (No.12). Article No.125305 . doi:10.1103/PhysRevB.77.125305 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.77.125305
Abstract
The one-electron potential, carrier concentration profile, quantized subband state energies, and parallel dispersion relations are calculated for an accumulation layer at a semiconductor surface by solving Poisson's equation within a modified Thomas-Fermi approximation and numerically solving the Schrodinger equation for the resulting potential well. A nonparabolic conduction band, described within the Kane k.p approximation, is incorporated in the model. Example calculations are performed for a typical clean InN surface and for a variety of surface state densities and bulk carrier concentrations. Agreement is found between the model calculations and experimental measurements of the subband energies and dispersions at c-plane InN surfaces from electron tunneling spectroscopy and angle resolved photoemission spectroscopy.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1098-0121 | ||||
Official Date: | March 2008 | ||||
Dates: |
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Volume: | Vol.77 | ||||
Number: | No.12 | ||||
Number of Pages: | 7 | ||||
Page Range: | Article No.125305 | ||||
DOI: | 10.1103/PhysRevB.77.125305 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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