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Band-gap and k.p. parameters for GaAlN and GaInN alloys

Pugh, SK; Dugdale, DJ; Brand, S; Abram, RA

Band-gap and k.p. parameters for GaAlN and GaInN alloys Thumbnail


Authors

SK Pugh

DJ Dugdale

S Brand



Abstract

Using a semi-empirical pseudopotential method, a set of band-structure calculations are performed on a range of GaInN and GaAlN alloys in both the zinc-blende and wurtzite structures. Pseudopotentials for the bulk materials are described by suitable V(q) functions, and these are used to construct the alloy pseudopotentials. The band gap as a function of alloy composition is studied, and it is found that there is no significant bowing in the case of GaAlN. The bowing is larger for GaInN, although heavily dependent on the strain present. A more detailed study of the wurtzite alloys is carried out for low Al and In fractions. Wurtzite k⋅p parameters for several alloys at concentrations commonly used in devices are obtained from the semi-empirical band structure using a Monte Carlo fitting procedure.

Citation

Pugh, S., Dugdale, D., Brand, S., & Abram, R. (1999). Band-gap and k.p. parameters for GaAlN and GaInN alloys. Journal of Applied Physics, 86(7), 3768-3772. https://doi.org/10.1063/1.371285

Journal Article Type Article
Acceptance Date Apr 20, 1999
Publication Date Oct 1, 1999
Deposit Date Dec 7, 2010
Publicly Available Date Dec 7, 2010
Journal Journal of Applied Physics
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 86
Issue 7
Pages 3768-3772
DOI https://doi.org/10.1063/1.371285
Public URL https://durham-repository.worktribe.com/output/1596150
Related Public URLs http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1999JAP....86.3768P&db_key=PHY

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Copyright Statement
Copyright (1999) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Pugh, S.K. and Dugdale, D.J. and Brand, S. and Abram, R.A. (1999) 'Band-gap and k.p. parameters for GaAlN and GaInN alloys.', Journal of applied physics., 86 (7). pp. 3768-3772 and may be found at http://dx.doi.org/10.1063/1.371285






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