Direct observations of the vacancy and its annealing in germanium
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2011-06
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Language
en
Pages
5
1-5
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 3×1014 cm−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
Keywords
divacancy, germanium, monovacancy, positron
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Citation
Slotte , J , Kilpeläinen , S , Tuomisto , F , Räisänen , J & Nylansted Larsen , A 2011 , ' Direct observations of the vacancy and its annealing in germanium ' , Physical Review B , vol. 83 , no. 23 , 235212 , pp. 1-5 . https://doi.org/10.1103/PhysRevB.83.235212