首页> 中文期刊> 《中国物理快报:英文版》 >Probing Lattice Vibrations at SiO2/Si Surface and Interface with Nanometer Resolution

Probing Lattice Vibrations at SiO2/Si Surface and Interface with Nanometer Resolution

         

摘要

Recent advances in monochromatic aberration corrected electron microscopy make it possible to detect the lattice vibrations with both high-energy resolution and high spatial resolution.Here,we use sub-10 me V electron energy loss spectroscopy to investigate the local vibrational properties of the SiO2/Si surface and interface.The energy of the surface mode is thickness dependent,showing a blue shift as z-thickness (parallel to the fast electron beam) of SiO2 film increases,while the energy of the bulk mode and the interface mode keeps constant.The intensity of the surface mode is well-described by a Bessel function of the second kind.The mechanism of the observed spatially dependent vibrational behavior is discussed and compared with dielectric response theory analysis.Our nanometer scale measurements provide useful information on the bonding conditions at the surface and interface.

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  • 来源
    《中国物理快报:英文版》 |2019年第2期|37-41|共5页
  • 作者单位

    International Center for Quantum Materials, Peking University, Beijing 100871;

    Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871;

    International Center for Quantum Materials, Peking University, Beijing 100871;

    Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871;

    Collaborative Innovation Centre of Quantum Matter, Beijing 100871;

    International Center for Quantum Materials, Peking University, Beijing 100871;

    Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871;

    International Center for Quantum Materials, Peking University, Beijing 100871;

    International Center for Quantum Materials, Peking University, Beijing 100871;

    Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871;

    International Center for Quantum Materials, Peking University, Beijing 100871;

    Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871;

    Nion Company, 11511 NE 118Th Street, Kirkland, Washington State 98034, USA;

    Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190;

    Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871;

    Shenzhen Key Laboratory of Quantum Science and Engineering, Shenzhen 518055;

    Collaborative Innovation Centre of Quantum Matter, Beijing 100871;

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  • 正文语种 eng
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