title: Dislocation emission around nanoindentations on a (001) fcc metal surface studied by scanning tunneling microscopy and atomistic simulations.
abstract: We present a combined study by scanning tunneling microscopy and atomistic simulations of the emission of dissociated dislocation loops by nanoindentation on a (001) fcc surface. The latter consist of two stacking-fault ribbons bounded by Shockley partials and a stair-rod dislocation. These dissociated loops, which intersect the surface, are shown to originate from loops of interstitial character emitted along the <110> directions and are usually located at hundreds of angstroms away from the indentation point. Simulations reproduce the nucleation and glide of these dislocation loops.
authors.affiliation: Departamento de Física de Materiales, Universidad Complutense, Madrid 28040, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Rodríguez de la Fuente
authors.forename: J A
authors.initials: JA
authors.lastname: Zimmerman
authors.forename: M A
authors.initials: MA
authors.lastname: González
authors.forename: J
authors.initials: J
authors.lastname: de La Figuera
authors.forename: J C
authors.initials: JC
authors.lastname: Hamilton
authors.forename: Woei Wu
authors.initials: WW
authors.lastname: Pai
authors.forename: J M
authors.initials: JM
authors.lastname: Rojo