Equilibrium shape of two-dimensional islands under stress
We show that the equilibrium shape anisotropy of two-dimensional islands in heteroepitaxial growth depends on island size, a consequence of the presence of strain. Even in homoepitaxy, in which the island shape has conventionally been equated with the ratio of step energies, a substrate surface stress anisotropy can influence island shape.
Li
A
University of Wisconsin, Madison, Wisconsin 53706, USA.
Liu
F
Lagally
MG