# Kris's Research Notes

## November 4, 2010

### GaAs Crystal Growth: Phase Diagram pt. 2

Filed under: GaAs Simulations — Kris Reyes @ 7:03 pm

This is a follow-up of this post.

I was worried that the asymmetry between the surface Gallium bond strength $\gamma(Ga(2), As(4))$  (which was set $0.7 eV$ in the previous post) and the surface Arsenic bond strength $\gamma(Ga(4), As(2))$ (which I varied between $0.85 eV$ and $0.95 eV$). In these trials, I made these two bond strengths more symmetric. Specifically, I fixed $\gamma(Ga(2), As(4)) = 0.95 eV$, and I varied $\gamma(Ga(4), A(s2)) \in \left\{0.85, 0.95\right\} eV$. I also varied Gallium flux $r_{\downarrow Ga} \in \left\{ 1, 5 \right\}$ monolayers/second. Here are the four resulting contour plots. (Note the horizontal label is incorrect. It should read $r_{\downarrow As}/r_{\downarrow Ga}$.)