Time Dependence of Charge Transfer Processes in Diamond Studied with Positrons
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© 2011 American Physical Society (APS). This is the accepted version of the following article: Mäki, J.-M. & Tuomisto, Filip & Varpula, A. & Fisher, D. & Khan, R. U. A. & Martineau, P. M. 2011. Time Dependence of Charge Transfer Processes in Diamond Studied with Positrons. Physical Review Letters. Volume 107, Issue 21. 217403/1-5. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.107.217403, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.107.217403.
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2011
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Mcode
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Language
en
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217403/1-5
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Physical Review Letters, Volume 107, Issue 21
Abstract
We have developed a method called optical transient positron spectroscopy and apply it to study the optically induced carrier trapping and charge transfer processes in natural brown type IIa diamond. By measuring the positron lifetime with continuous and pulsed illumination, we present an estimate of the optical absorption cross section of the vacancy clusters causing the brown color. The vacancy clusters accept electrons from the valence band in the absorption process, giving rise to photoconductivity.Description
Keywords
diamond, positron, optical, transient
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Citation
Mäki, J.-M. & Tuomisto, Filip & Varpula, A. & Fisher, D. & Khan, R. U. A. & Martineau, P. M. 2011. Time Dependence of Charge Transfer Processes in Diamond Studied with Positrons. Physical Review Letters. Volume 107, Issue 21. 217403/1-5. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.107.217403