title: Self-assembly via adsorbate-driven dislocation reactions.
abstract: Deposition of S onto a monolayer of Ag/Ru(0001) transforms the herringbone pattern of the clean Ag film into a strikingly regular array of 2D-vacancy islands [Nature (London) 397, 238 (1999)]]. Time-resolved scanning tunneling microscopy reveals that this nanometer-scale restructuring occurs by a cooperative mechanism involving the sequential formation of triangular regions with fcc and hcp stacking. Using a 2D Frenkel-Kontorova model, we can simulate the creation of these triangular building blocks via basic dislocation motions and reactions.
authors.affiliation: Sandia National Laboratories, Livermore, California 94550, USA.
authors.forename: K
authors.initials: K
authors.lastname: Thürmer
authors.forename: C B
authors.initials: CB
authors.lastname: Carter
authors.forename: N C
authors.initials: NC
authors.lastname: Bartelt
authors.forename: R Q
authors.initials: RQ
authors.lastname: Hwang