Lookup NU author(s): Professor Patrick Briddon
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Ultra-high-resolution infra-red local vibrational mode (IR LVM) spectroscopy measurements together with density-functional calculations have been used to identify the signatures of close substitutional nitrogen (NAs) pairs in GaAs1 - x Nx alloys with concentrations of x < 0.025. We show that the presence of sub-peaks close to the NAs absorption band can be attributed to nitrogen pairs up to fourth neighbor position. Additionally, we suggest that the nitrogen pairs which give rise to the deepest levels below the conduction band edge are the first to be removed upon annealing. © 2007 Elsevier B.V. All rights reserved.
Author(s): Carvalho A, Barker SJ, Jones R, Williams RS, Ashwin MJ, Newman RC, Stavrinou PN, Parry G, Jones TS, Oberg S, Briddon PR
Publication type: Article
Publication status: Published
Journal: Physica B: Condensed Matter
ISSN (print): 0921-4526
ISSN (electronic): 1873-2135
Publisher: Elsevier BV
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