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

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.

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.

Item Type:Article
Full text:PDF - Published Version (82Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1063/1.371285
Publisher 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
Record Created:07 Dec 2010 12:20
Last Modified:07 Dec 2010 12:45

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