On the role of kinetic and interfacial anisotropy in the crystal growth theory
Mi-Ho GigaUniversity of Tokyo, Japan
Yoshikazu GigaUniversity of Tokyo, Japan
A planar anisotropic curvature flow equation with constant driving force term is considered when the interfacial energy is crystalline. The driving force term is given so that a closed convex set grows if it is sufficiently large. If initial shape is convex, it is shown that a flat part called a facet (with admissible orientation) is instantaneously formed. Moreover, if the initial shape is convex and slightly bigger than the critical size, the shape becomes fully faceted in a finite time provided that the Frank diagram of interfacial energy density is a regular polygon centered at the origin. The proofs of these statements are based on approximation by crystalline algorithm whose foundation was established a decade ago. Our results indicate that the anisotropy of interfacial energy plays a key role when crystal is small in the theory of crystal growth. In particular, our theorems explain a reason why snow crystal forms a hexagonal prism when it is very small.
Cite this article
Mi-Ho Giga, Yoshikazu Giga, On the role of kinetic and interfacial anisotropy in the crystal growth theory. Interfaces Free Bound. 15 (2013), no. 4, pp. 429–450DOI 10.4171/IFB/309