Effect of step stiffness and diffusion anisotropy on the meandering of a growing vicinal surface.
Effect of step stiffness and diffusion anisotropy on the meandering of a growing vicinal surface.
复制标题
阶梯刚度和扩散各向异性对生长的邻近表面的曲折的影响。
DOI：
10.1103/physrevlett.96.166104
复制
发表时间：
2006
影响因子：
8.6
通讯作者：
A. Verga
中科院分区：
文献类型：
--
作者：
T. Frisch;A. Verga
我们研究了具有不同性质的阶梯交替变化的表面上的台阶曲折不稳定性，如Si(001)的情况。扩散各向异性和阶跃刚度之间的相互作用导致了对应于弯曲模的有限波长不稳定性。失稳超过阈值取决于失稳通量和稳定刚度差的相对大小。曲流动力学受守恒的Kuramoto-Sivashinsky方程支配，该方程表现出时空粗化。
We study the step meandering instability on a surface characterized by the alternation of terraces with different properties, as in the case of Si(001). The interplay between diffusion anisotropy and step stiffness induces a finite wavelength instability corresponding to a meandering mode. The instability sets in beyond a threshold value which depends on the relative magnitudes of the destabilizing flux and the stabilizing stiffness difference. The meander dynamics is governed by the conserved Kuramoto-Sivashinsky equation, which display spatiotemporal coarsening.