Stress and morphology evolution during island growth.
We performed a series of hybrid molecular-dynamics simulations of island growth on a substrate and monitored island stress evolution for several different island/substrate interfacial energies. Smaller (larger) interfacial energy yields islands with a stronger (weaker) compressive stress-thickness product. We present analytical results that suggest that the stress-thickness product is a linear function of the substrate coverage, with slope equal to minus the substrate surface stress, if the island is in mechanical equilibrium, and verify these results with simulation data.
Pao
Chun-Wei
CW
Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Srolovitz
David J
DJ