Direct observations of the vacancy and its annealing in germanium
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© 2011 American Physical Society (APS). This is the accepted version of the following article: Slotte, J. & Kilpeläinen, S. & Tuomisto, Filip & Räisänen, J. & Larsen, A. Nylandsted. 2011. Direct observations of the vacancy and its annealing in germanium. Physical Review B. Volume 83, Issue 23. 235212/1-5. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.83.235212, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.235212.
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en
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235212/1-5
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Physical Review B, Volume 83, Issue 23
Abstract
Weakly n-type doped germanium has been irradiated with protons up to a fluence of 3×10 exp 14 cm exp −2 at 35 K and 100 K in a unique experimental setup. Positron annihilation measurements show a defect lifetime component of 272±4 ps at 35 K in in situ positron lifetime measurements after irradiation at 100 K. This is identified as the positron lifetime in a germanium monovacancy. Annealing experiments in the temperature interval 35–300 K reveal two annealing stages. The first at 100 K is tentatively associated with the annealing of the Frenkel pair, the second at 200 K with the annealing of the monovacancy. Above 200 K it is observed that mobile neutral monovacancies form divacancies, with a positron lifetime of 315 ps.Description
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Slotte, J. & Kilpeläinen, S. & Tuomisto, Filip & Räisänen, J. & Larsen, A. Nylandsted. 2011. Direct observations of the vacancy and its annealing in germanium. Physical Review B. Volume 83, Issue 23. 235212/1-5. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.83.235212