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Optical absorption by dilute GaNSb alloys : Influence of N pair states

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Date
22/07/2013
Author
Mudd, J. J.
Kybert, N. J.
Linhart, W. M.
Buckle, L.
Ashley, T.
King, P. D. C.
Jones, T. S.
Ashwin, M. J.
Veal, T. D.
Keywords
Conduction bands
Band gap
III-V semiconductors
Band models
Absorption spectra
Valence bands
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Abstract
The optical properties of GaNSb alloys with N contents of up to 2.5% have been investigated at room temperature using infrared absorption spectroscopy. The evolution of the absorption onsets with N content has been described using a three level band anticrossing model of the N localized states interactions with the GaSb conduction band. This approach includes the effect of N pair states, which is critical to reproduce the observed optical properties. This confirms theoretical predictions that N pair states have a more pronounced effect on the band dispersion in GaNSb than in GaNAs.
Citation
Mudd , J J , Kybert , N J , Linhart , W M , Buckle , L , Ashley , T , King , P D C , Jones , T S , Ashwin , M J & Veal , T D 2013 , ' Optical absorption by dilute GaNSb alloys : Influence of N pair states ' , Applied Physics Letters , vol. 103 , no. 4 , 042110 . https://doi.org/10.1063/1.4816519
Publication
Applied Physics Letters
Status
Peer reviewed
DOI
https://doi.org/10.1063/1.4816519
ISSN
0003-6951
Type
Journal article
Rights
Copyright 2013, 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 Applied Physics Letters, Vol 103, Issue 4, and may be found at: http://scitation.aip.org/content/aip/journal/apl/103/4/10.1063/1.4816519
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/4324

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