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Local-strain mapping on Ag(111) islands on Nb(110)

机译:Nb(110)上的Ag(111)岛上的局部应变映射

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摘要

The local in-plane strain of Ag(111) islands on the Nb(l10) surface has been derived from the lateral variation of the electronic density of states measured by scanning tunneling spectroscopy. The onset energy E_(ss) of the Shockley-type surface-state band is shifted to higher energies compared to the bulk due to thermal strain arising from the difference in thermal expansion between Nb and Ag and cooling by 565 K. A quantitative dependence of E_(ss) from the strain is obtained by density-functional theory calculations. This allows a mapping of the local strain of individual Ag islands on the nanometer scale.
机译:Nb(l10)表面上的Ag(111)岛的局部面内应变已从通过扫描隧道光谱法测得的态的电子密度的横向变化得出。由于Nb和Ag之间的热膨胀差异和565 K的冷却引起的热应变,Shockley型表面态能带的起始能量E_(ss)与整体相比转移到更高的能量。通过密度泛函理论计算获得应变的E_(ss)。这允许在纳米尺度上绘制各个银岛的局部应变。

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  • 来源
    《Applied Physics Letters》 |2012年第6期|p.063111.1-063111.4|共4页
  • 作者单位

    Physikalisches lnstitut and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany;

    Physikalisches lnstitut and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany;

    Institut fur Festkorperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany;

    Institut fur Festkorperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany,Department of Physics, University of Central Florida, Orlando, Florida 32816, USA;

    Institut fur Festkorperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany;

    Physikalisches lnstitut and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany;

    Physikalisches lnstitut and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany,Institut fur Festkorperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany;

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  • 正文语种 eng
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