AVS 49th International Symposium
    Nanometer Structures Wednesday Sessions
       Session NS-WeM

Paper NS-WeM7
Electronic Structure of Ag/Cu Striped Nanostructures

Wednesday, November 6, 2002, 10:20 am, Room C-207

Session: Nanostructured Materials
Presenter: E.G. Michel, Universidad Autonoma de Madrid, Spain
Authors: J. Lobo, Universidad Autonoma de Madrid, Spain
E.G. Michel, Universidad Autonoma de Madrid, Spain
A. Bachmann, Universitaet Osnabrueck, Germany
S. Speller, Katholieke Universiteit Nijmegen, The Netherlands
L. Roca, LURE-CNRS, France
J. Kuntze, Donostia International Physics Center and Centro Mixto CSIC/UPV, Spain
J.E. Ortega, Donostia International Physics Center and Centro Mixto CSIC/UPV, Spain
Correspondent: Click to Email
The deposition of Ag on a stepped Cu surface gives rise to a periodic faceting of the surface.@footnote 1@ The superstructure obtained is a very regular distribution of Cu and Ag stripes, with a lateral width in the range of 50-100 Å. The electronic band structure of this nanostructure has been studied using angle-resolved photoemission, for a range of Ag coverages between 0 and 1.2 ML. The photoemission experiments have been performed at the SU8 undulator beam line at LURE (Orsay, France). Surface states at Ag/Cu one-dimensional striped nanostructures are decoupled into Ag- and Cu-like stripe states. A model potential scaled from the infinite system explains the results. As a consequence, both Cu-like and Ag-like states display the characteristic periodicities of the corresponding facet plane. Furthermore, Cu-like stripe states exhibit the same terrace quantum-size effects observed in the infinite Cu(111) vicinal crystals. @FootnoteText@ @footnote 1@ A. R. Bachmann, A. Mugarza, J. E. Ortega, and S. Speller, Phys. Rev. B 64, 153409 (2001).