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Evidence of N substitution by Mn in GaN

机译:GaN中Mn替代N的证据

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摘要

We report on the lattice location of Mn in wurtzite GaN using β~ emission channeling. In addition to the majority substituting for Ga, we locate up to 20% of the Mn atoms in N sites. We propose that the incorporation of Mn in N sites is enabled under sufficiently high concentrations of N vacancies, and stabilized by a highly charged state of the Mn cations. Since N substitution by Mn impurities in wurtzite GaN has never been observed experimentally or even considered theoretically before, it challenges the current paradigm of transition metal incorporation in wide-gap dilute magnetic semiconductors.
机译:我们利用β〜发射通道研究了锰锌矿在纤锌矿型GaN中的晶格位置。除了大部分取代Ga之外,我们还在N位点中定位了多达20%的Mn原子。我们建议在足够高浓度的N空位下启用Mn在N位中的掺入,并通过Mn阳离子的高电荷态使其稳定。由于纤锌矿型GaN中的Mn杂质替代N从未在实验上或理论上进行过观察,因此它对过渡金属掺入宽隙稀磁半导体中的当前范式提出了挑战。

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  • 来源
    《Physical review》 |2012年第19期|195202.1-195202.4|共4页
  • 作者单位

    Instituut voor Kern-en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium,Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, 2686-953 Sacavem, Portugal,IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Universidade do Porto, 4169-007 Porto, Portugal;

    Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, 2686-953 Sacavem, Portugal;

    Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, 2686-953 Sacavem, Portugal;

    Instituut voor Kern-en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium;

    Instituut voor Kern-en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium;

    Centro de Fi'sica Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal;

    IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Universidade do Porto, 4169-007 Porto, Portugal;

    Instituut voor Kern-en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetic semiconductors; ion radiation effects; Ⅱ-Ⅵ semiconductors;

    机译:磁性半导体离子辐射效应;Ⅱ-Ⅵ半导体;

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