Figure 2

(a) The conventional growth process. Depositing particles begin their trajectory starting strictly at h_max + 1, one lattice unit above the maximum surface height. Initializing particles an additional height h_a above h_max has no effect on morphology because a lateral translation by h_atan(θ) results in the same flux at the surface, where θ is the trajectory angle. Because the initial (x, y) position of the particle is chosen randomly, arbitrary translations are permitted. (b) The modified growth process assumes a mean collision height above the surface at height h_l, where the particles begin their trajectory toward the surface.