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Disclinations in C_(60) molecular layers on WO_2/W(110) surfaces

机译：WO_2 / W（110）表面上的C_（60）分子层中的位错

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摘要

A scanning tunneling microscopy study of a planar close-packed C_(60) hexagonal molecular layer on a WO_2/W(110) substrate reveals the existence of C_(60) domains exhibiting two preferred orientations at an angle with an underlying periodic groove structure in the substrate. An analysis of the van der Waals interactions between substrate and layer retrieves the observed misorientations as those corresponding to minima in the interaction energy of the substrate-layer system. The misorientation between two C_(60) domains is accommodated in a tilt boundary by a linear array of molecular structural units identified as disclination dipoles, i.e., rotational defects in the hexagonal structure of the layer. A field theory of disclinations and dislocations is used to construct maps of the elastic energy, strains, curvatures, and stresses induced by the lattice defects over the layer. The predicted regions of high compression are found to overlap with those where the fullerene molecules do not undergo rotation.
机译：对WO_2 / W（110）基底上的平面紧密堆积的C_（60）六角形分子层进行的扫描隧道显微镜研究表明，存在C_（60）域，该区域在与下方的周期性沟槽结构成一定角度时表现出两个优选的方向。基板。对基底和层之间的范德华相互作用的分析获得了观察到的取向错误，该取向错误对应于基底层系统相互作用能的最小值。两个C_（60）域之间的取向失调通过识别为旋错偶极子的分子结构单元的线性阵列（即该层六边形结构中的旋转缺陷）容纳在倾斜边界中。错位和位错的场论用于构造由层上晶格缺陷引起的弹性能，应变，曲率和应力的图。发现高压缩的预测区域与富勒烯分子不旋转的区域重叠。

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  • 来源
    《Physical review》 |2014年第21期|214106.1-214106.9|共9页
  • 作者

    S. I. Bozhko; V. Taupin; M. Lebyodkin; C. Fressengeas; E. A. Levchenko; K. Radikan; O. Luebben; V. N. Semenov; I. V. Shvets;

  • 作者单位

    Institute of Solid State Physics, Russian Academy of Science, 142432 Chernogolovka, Moscow District, Russia,Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), School of Physics, Trinity College Dublin, Dublin 2, Ireland;

    Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux, Universite de Lorraine/CNRS, Ile du Saulcy, 57045 Metz Cedex, France;

    Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux, Universite de Lorraine/CNRS, Ile du Saulcy, 57045 Metz Cedex, France;

    Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux, Universite de Lorraine/CNRS, Ile du Saulcy, 57045 Metz Cedex, France;

    Department of Physics, Astrakhan State University, Astrakhan 414056, Russia;

    Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), School of Physics, Trinity College Dublin, Dublin 2, Ireland;

    Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), School of Physics, Trinity College Dublin, Dublin 2, Ireland;

    Institute of Solid State Physics, Russian Academy of Science, 142432 Chernogolovka, Moscow District, Russia;

    Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), School of Physics, Trinity College Dublin, Dublin 2, Ireland;

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  • 正文语种 eng
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  • 关键词

    linear defects: dislocations, disclinations; grain and twin boundaries;

    机译：线性缺陷：错位;错位;晶界和孪晶界;

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