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Large spherical vacancy clusters in diamond - Origin of the brown colouration?

Lookup NU author(s): Professor Patrick Briddon

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Abstract

The origin of the brown colouration of diamond is still under discussion. Recent experiments indicate that the brown colour is caused by vacancy-type extended defects, however the shape and size of these defects remains unknown. In this work, we investigate the structural, electrical and optical properties of a large spherical vacancy clusters consisting of 71 vacancies by means of density functional theory. A comparison of our calculations with recent experimental measurements on brown natural diamond shows striking similarities and hence we suggest the brown colouration originates from large spherical vacancy clusters. (C) 2008 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Fujita N, Jones R, Oberg S, Briddon PR

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 19th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides and Silicon Garbide

Year of Conference: 2009

Pages: 843-845

ISSN: 0925-9635

Publisher: Diamond and Related Materials: Elsevier SA

URL: http://dx.doi.org/10.1016/j.diamond.2008.10.061

DOI: 10.1016/j.diamond.2008.10.061

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