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Lookup NU author(s): Dr Jon Goss,
Professor Patrick Briddon
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The low mass of hydrogen leads to highly localised, high-frequency vibrational modes associated with H-containing defects in crystalline materials. In addition to vibrational spectroscopy, the presence of hydrogen in diamond has been identified from several experimental techniques. In particular, paramagnetic resonance shows that H is often associated with lattice vacancies, but in many cases the microscopic structure of the defects remains to be determined. We present the results of first-principles density-functional modelling of selected H-containing point defects, reporting both the calculated frequencies and the change in frequencies with applied strain. We show that more constrained environments lead to significantly larger strain-related shifts in frequency than more open environments, such as where the H is associated with lattice vacancies.
Author(s): Goss JP, Briddon PR
Publication type: Article
Publication status: Published
Journal: Physical Chemistry Chemical Physics
Print publication date: 09/05/2011
ISSN (print): 1463-9076
ISSN (electronic): 1463-9084
Publisher: Royal Society of Chemistry
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