title: Fast coarsening in unstable epitaxy with desorption.
abstract: Homoepitaxial growth is unstable towards the formation of pyramidal mounds when interlayer transport is reduced due to activation barriers to hopping at step edges. Simulations of a lattice model and a continuum equation show that a small amount of desorption dramatically speeds up the coarsening of the mound array, leading to coarsening exponents between 1/3 and 1/2. The underlying mechanism is the faster growth of larger mounds due to their lower evaporation rate.
authors.affiliation: Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 53 Prague 6, Czech Republic.
authors.forename: P
authors.initials: P
authors.lastname: Smilauer
authors.forename: M
authors.initials: M
authors.lastname: Rost
authors.forename: J
authors.initials: J
authors.lastname: Krug
mesh_terms: D000327:Adsorption; D055592:Biophysical Phenomena; D001703:Biophysics; D003460:Crystallization; D013997:Time Factors