Two-Dimensional Nucleation with Edge and Corner Diffusion

Details Two-Dimensional Nucleation with Edge and Corner Diffusion Two-Dimensional Nucleation with Edge and Corner Diffusion

2003-01-08

arxiv.org/abs/cond-mat/0301091v2

J. Phys. Soc. Jpn. 72 (2003) 2008-2014.

Physics

Condensed Matter

Materials Science

8 pages, 7 figures, Change content with additional references and figures

Scientific paper

10.1143/JPSJ.72.2008

The effect of edge and corner diffusions on the morphology and on the density of islands nucleated irreversibly on a flat substrate surface is studied. Without edge and corner diffusion, islands are fractal. As an edge diffusion constant $D_e$ increases, islands tend to take a cross shape with four needles in the $< 10 >$ direction. Additional corner diffusion with a diffusion constant $D_c$ yields square islands. When $D_e$ is small relative to the surface diffusion constant $D_s$, the square corner shows the Berg instability to produce hopper growth in the $<11>$ direction. The corner diffusion influences the island number density $n$. At a deposition flux $F$ with a small $D_c$, mainly monomers are mobile and $n \propto (F/D_s)^{1/3}$. At large $D_c$, dimers and trimers are also mobile and $n \propto F^{3/7} D_s^{-5/21} D_c^{-4/21}$. The $F$ dependence is in good agreement to the rate equation analysis, but the dependence on $D_c$ cannot be explained by the theory.

Affiliated with

Also associated with

No associations

Rating

Two-Dimensional Nucleation with Edge and Corner Diffusion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Two-Dimensional Nucleation with Edge and Corner Diffusion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-Dimensional Nucleation with Edge and Corner Diffusion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-96667