title: Electronically induced atom motion in engineered CoCun nanostructures.
abstract: We have measured the quantum yield for exciting the motion of a single Co atom in CoCu(n) linear molecules constructed on a Cu(111) surface. The Co atom switched between two lattice positions during electron excitation from the tip of a scanning tunneling microscope. The tip location with highest probability for inducing motion was consistent with the position of an active state identified through electronic structure calculations. Atom motion within the molecule decreased with increased molecular length and reflected the corresponding variation in electronic structure.
authors.affiliation: Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899-8412, USA. joseph.stroscio@nist.gov
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Stroscio
authors.forename: Francesca
authors.initials: F
authors.lastname: Tavazza
authors.forename: Jason N
authors.initials: JN
authors.lastname: Crain
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Celotta
authors.forename: Anne M
authors.initials: AM
authors.lastname: Chaka