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Nonequilibrium Kink Density from One-Dimensional Nucleation for Step Velocity Predictions

机译:非尺寸成核的非QuiBibiBibibibibibibibium密度用于步进速度预测

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摘要

Crystal growth rates depend on the density of kink sites along step edges, ρ. The supersaturation-dependence of the kink density, ρ( S ), is often ignored despite available nonequilibrium models for centrosymmetric crystals. The aim of this work is to derive ρ( S ) from a rather simple one-dimensional nucleation framework in a manner that accounts for multiheight kinks. These become more prevalent at higher S and/or lower kink energies where the step front roughens (i.e., higher ρ). We arrive at a density of kinetic kinks that contribute to the step velocity and make comparisons with other models and simulations. Our model almost entirely eliminates systematic errors in predicted step velocities and crystal growth rates.
机译:晶体生长速率取决于沿着台阶边缘的扭结位点的密度ρ。 尽管可用的用于焦体晶体的非QuibiBribriaM模型,但是扭结的依赖性依赖性依赖性依赖性依赖性。 这项工作的目的是以相当简单的一维核心框架从一个占多HeightKinks的方式从相当简单的一维成核框架中推导出ρ。 这些在步进前粗糙度(即,较高ρ)的较高的S和/或下扭结能量下变得更加普遍。 我们达到了致力于阶梯速度的动力扭结密度,并与其他模型和模拟进行比较。 我们的模型几乎完全消除了预测的阶梯速度和晶体增长率的系统误差。

著录项

  • 来源
    《Crystal growth & design》 |2018年第2期|共5页
  • 作者单位

    Department of Chemical Engineering and Department of Chemistry and Biochemistry University of California Santa Barbara United States;

    Department of Chemical Engineering and Department of Chemistry and Biochemistry University of California Santa Barbara United States;

    Department of Chemical Engineering and Department of Chemistry and Biochemistry University of California Santa Barbara United States;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
  • 关键词

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