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Enhanced binding energy of manganese acceptors close to the GaAs(110) surface

机译:靠近GaAs(110)表面的锰受体的结合能增强

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摘要

Scanning tunneling spectroscopy was performed at low temperature on buried manganese (Mn) acceptors below the(110) surface of gallium arsenide. The main Mn-induced features consisted of a number of dI/dV peaks in the band gap of the host material. The peaks in the band gap are followed by negative differential conductivity, which can be understood in terms of an energy-filter mechanism. The spectroscopic features detected on the Mn atoms clearly depend on the depth of the addressed acceptor below the surface. Combining the depth dependence of the positions of the Mn-induced peaks and using the energy-filter model to explain the negative resistance qualitatively proves that the binding energy of the hole bound to the Mn atom increases for Mn acceptors closer to the surface.
机译:在低温下对砷化镓(110)表面以下的掩埋锰(Mn)受体进行扫描隧道光谱。 Mn诱导的主要特征包括主体材料带隙中的多个dI / dV峰。带隙中的峰值之后是负差分电导率,这可以从能量过滤器机制的角度理解。在Mn原子上检测到的光谱特征显然取决于表面以下被寻址受体的深度。结合Mn诱导峰的位置的深度依赖性,并使用能量过滤器模型定性地解释负电阻,证明了当Mn受体离表面更近时,与Mn原子结合的空穴的结合能增加。

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  • 来源
    《Physical review》 |2010年第3期|P.035303.1-035303.6|共6页
  • 作者单位

    COBRA Inter-University Research Institute, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands;

    rnCOBRA Inter-University Research Institute, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands;

    rnCOBRA Inter-University Research Institute, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands;

    rnCOBRA Inter-University Research Institute, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands;

    rnIMEC, Kapeldreef 75, B-3001 Leuven, Belgium;

    rnDepartment of Physics, University of New Hampshire, Durham, New Hampshire 03824, USA;

    rnOptical Science and technology Center and Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, USA;

    rnCOBRA Inter-University Research Institute, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands;

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  • 正文语种 eng
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  • 关键词

    scanning tunneling microscopy (including chemistry induced with STM); semiconductor surfaces; impurity and defect levels; energy states of adsorbed species; impurity and defect levels;

    机译:扫描隧道显微镜(包括用STM诱导的化学反应);半导体表面;杂质和缺陷水平;吸附物质的能量状态;杂质和缺陷水平;

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