title: Elastic relaxations in ultrathin epitaxial alloy films.
abstract: Elastic interactions responsible for the stability of nanometer-scale patterns in ultrathin, bulk-immiscible-alloy films are analyzed within the context of a hybrid atomistic-continuum model. Two apparently different descriptions of alloy film behavior, a continuum elasticity theory describing a deformable substrate and a rigid substrate atomistic scheme, emerge naturally as limiting cases on long and short length scales, respectively. Quantitative first-principles calculations explain the origin of recently observed nanoscale patterns in Co-Ag/Ru(0001), and reveal a surprising failure of the continuum model.
authors.affiliation: Sandia National Laboratories, Livermore, California, USA.
authors.forename: V
authors.initials: V
authors.lastname: Ozoliņs
authors.forename: M
authors.initials: M
authors.lastname: Asta
authors.forename: J J
authors.initials: JJ
authors.lastname: Hoyt