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Identification of the local vibrational modes of small nitrogen clusters in dilute GaAsN

Lookup NU author(s): Professor Patrick Briddon

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Abstract

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.

Publication metadata

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

Year: 2007

Volume: 401-402

Pages: 339-342

ISSN (print): 0921-4526

ISSN (electronic): 1873-2135

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.physb.2007.08.182

DOI: 10.1016/j.physb.2007.08.182

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