Atomic-scale structure of dislocations revealed by scanning tunneling microscopy and molecular dynamics -: art. no. 206106
Atomic-scale structure of dislocations revealed by scanning tunneling microscopy and molecular dynamics -: art. no. 206106
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DOI：
10.1103/physrevlett.88.206106
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发表时间：
2002-05-20
影响因子：
8.6
通讯作者：
Besenbacher, F
中科院分区：
文献类型：
--
作者：
Christiansen, J;Morgenstern, K;Besenbacher, F
用扫描隧道显微镜（STM）和分子动力学的相互作用研究了位错与Ag（111）表面的相交。而STM提供的表面结构和伯格斯矢量的位错原子分辨的信息，模拟可以用来确定近表面区域的位错结构和取向。以类似的方式，可以研究其他扩展缺陷的亚表面结构。模拟结果表明，位错重新定向的偏在表面区域导致分裂宽度增加的表面，与STM观察。表面引起的交叉滑移的影响进行了讨论。
The intersection between dislocations and a Ag(111) surface has been studied using an interplay of scanning tunneling microscopy (STM) and molecular dynamics. Whereas the STM provides atomically resolved information about the surface structure and Burgers vectors of the dislocations, the simulations can be used to determine dislocation structure and orientation in the near-surface region. In a similar way, the subsurface structure of other extended defects can be studied. The simulations show dislocations to reorient the partials in the surface region leading to an increased splitting width at the surface, in agreement with the STM observations. Implications for surface-induced cross slip are discussed.