摘要翻译:
将含有螺位错的螺旋形丘的生长与二维形核的婚礼蛋糕的生长进行了比较。通过相场模拟和同质外延生长实验,我们发现,当台阶边缘势垒显著抑制层间输运时,两种结构获得了相同的特征大尺度形状。在Pt(111)上观察到的较高的垂直生长速率反映了顶区原子不同的掺入机制,可以用增强的表观台阶边缘势垒来表示。
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英文标题:
《Spiral Growth and Step Edge Barriers》
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作者:
A. Redinger, O. Ricken, P. Kuhn, A. Raetz, A. Voigt, J. Krug and T.
Michely
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Materials Science 材料科学
分类描述:Techniques, synthesis, characterization, structure. Structural phase transitions, mechanical properties, phonons. Defects, adsorbates, interfaces
技术,合成,表征,结构。结构相变,力学性质,声子。缺陷,吸附质,界面
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
The growth of spiral mounds containing a screw dislocation is compared to the growth of wedding cakes by two-dimensional nucleation. Using phase field simulations and homoepitaxial growth experiments on the Pt(111) surface we show that both structures attain the same characteristic large scale shape when a significant step edge barrier suppresses interlayer transport. The higher vertical growth rate observed for the spiral mounds on Pt(111) reflects the different incorporation mechanisms for atoms in the top region and can be formally represented by an enhanced apparent step edge barrier.
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PDF链接:
https://arxiv.org/pdf/709.2327