title: Structure of quantum wires in Au/Si(557).
abstract: The structure of the Au/Si(557) surface is determined from three-dimensional x-ray diffraction measurements, which directly mandate a single Au atom per unit cell. We use a "heavy atom" method in which the Au atom images the rest of the structure. Au is found to substitute for a row of first-layer Si atoms in the middle of the terrace, which then reconstructs by step rebonding and adatoms. The structure is consistent with the 1D metallic behavior seen by photoemission.
authors.affiliation: Department of Physics, University of Illinois, Urbana, IL 61801, USA.
authors.forename: I K
authors.initials: IK
authors.lastname: Robinson
authors.forename: P A
authors.initials: PA
authors.lastname: Bennett
authors.forename: F J
authors.initials: FJ
authors.lastname: Himpsel