Time dependence of charge transfer processes in diamond studied with positrons

J. M. Mäki; F. Tuomisto; A. Varpula; D. Fisher; R. U.A. Khan; P. M. Martineau

doi:10.1103/PhysRevLett.107.217403

Time dependence of charge transfer processes in diamond studied with positrons

J. M. Mäki (Corresponding Author), F. Tuomisto, A. Varpula, D. Fisher, R. U.A. Khan, P. M. Martineau

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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.

Original language	English
Article number	217403
Journal	Physical Review Letters
Volume	107
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.107.217403
Publication status	Published - 16 Nov 2011
MoE publication type	Not Eligible

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10.1103/PhysRevLett.107.217403

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AU - Martineau, P. M.

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Time dependence of charge transfer processes in diamond studied with positrons

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