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Evidence for Two Mg Related Acceptors in GaN
Linköping University, Department of Physics, Chemistry and Biology, Materials Science . Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Materials Science . Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Materials Science . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-9840-7364
Linköping University, Department of Physics, Chemistry and Biology, Materials Science . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2597-3322
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2009 (English)In: PHYSICAL REVIEW LETTERS, ISSN 0031-9007, Vol. 102, no 23, 235501- p.Article in journal (Refereed) Published
Abstract [en]

The optical signatures of Mg-related acceptors in GaN have been revisited in samples specifically grown on bulk GaN templates, to avoid strain broadening of the optical spectra. Bound-exciton spectra can be studied in these samples for Mg concentrations up to [Mg]approximate to 2x10(19) cm(-3). Contrary to previous work it is found that instabilities in the photoluminescence spectra are not due to unstable shallow donors, but to unstable Mg-related acceptors. Our data show that there are two Mg-related acceptors simultaneously present: the regular (stable) substitutional Mg acceptor, and a complex acceptor which is unstable in p-GaN.

Place, publisher, year, edition, pages
2009. Vol. 102, no 23, 235501- p.
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Natural Sciences
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URN: urn:nbn:se:liu:diva-19654DOI: 10.1103/PhysRevLett.102.235501OAI: oai:DiVA.org:liu-19654DiVA: diva2:227218
Available from: 2009-07-10 Created: 2009-07-10 Last updated: 2015-09-22

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Monemar, BoPaskov, PlamenPozina, GaliaHemmingsson, CarlBergman, Peder

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