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首页> 外文期刊>Journal of the Physical Society of Japan >One-by-one introduction of single lattice planes in a bottlenecked gold contact during stretching
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One-by-one introduction of single lattice planes in a bottlenecked gold contact during stretching

机译：拉伸过程中瓶颈金接触中的单个晶格平面一对一引入

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摘要

We observed the structural and conductance evolution of bottleneck-shaped gold contacts with [111] and [100] axes ([111] and [100] contacts) simultaneously during stretching. The [111] and [100] contacts were elastically stretched until a single (111) or (100) lattice plane was introduced by plastic deformation. The conductance decreased gradually by about 0.5 - 0.8G_0 in the elastic regime, and subsequently stepped down at the plastic deformation. Since the conductance values changed depending on the strain, they were not quantized. The conductance histograms displayed rather broad peaks due to the elastic regime. These peaks reflected the particular sequence of the mechanical deformation of the contacts, in strong contrast to the peaks of the [110] contacts, which reflected the quantization as reported previously. Below 10G_0, we found that the gold [111] and [100] contacts had five and three specific structures, respectively, in addition to a single-atom contact at 1G_0. We conclude that, for a bottlenecked gold contact, the strain extends over many lattice fringes along the stretching axis and the yield do not occur until sufficient space is available to introduce an additional atomic layer.
机译：我们观察到在拉伸过程中同时具有[111]和[100]轴（[111]和[100]接触）的瓶颈形金接触的结构和电导演变。弹性拉伸[111]和[100]触点，直到通过塑性变形引入单个（111）或（100）晶格平面。在弹性状态下，电导逐渐降低约0.5-0.8G_0，然后在塑性变形时降低。由于电导值根据应变而变化，因此无法量化。由于弹性状态，电导直方图显示了相当宽的峰值。这些峰值反映了触点机械变形的特定顺序，与[110]触点的峰值形成鲜明对比，后者反映了先前报道的量化。在10G_0以下，我们发现金[111]和[100]触点除了在1G_0处的单原子触点外，还分别具有五个和三个特定结构。我们得出结论，对于瓶颈金接触，应变沿拉伸轴在许多晶格条纹上扩展，直到有足够的空间可用来引入额外的原子层时，屈服才会出现。

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