Low-temperature shape relaxation of two-dimensional islands by edge diffusion

Article

关键词: SURFACE DIFFUSION;    GROWTH;    NANOSTRUCTURES;    COALESCENCE;    CAPILLARITY;    ANISOTROPY;   

DOI  :  10.1103/PhysRevB.62.16074

来源: SCIE

【 摘 要 】

We present a precise microscopic description of the limiting step for low-temperature shape relaxation of two-dimensional islands in which activated diffusion of particles along the boundary is the only mechanism of transport allowed. In particular, we are able to explain why the system is driven irreversibly towards equilibrium. Based on this description, we present a scheme for calculating the duration of the limiting step at each stage of the relaxation process. Finally, we calculate numerically the total relaxation time as predicted by our results and compare it with simulations of the relaxation process.

【 授权许可】

Free