title: Photoelectron diffraction imaging for C2H2 and C2H4 chemisorbed on Si(100) reveals a new bonding configuration
abstract: A new adsorption site for adsorbed acetylene on Si(100) is observed by photoelectron imaging based on the holographic principle. The diffraction effects in the carbon 1s angle-resolved photoemission are inverted (including the small-cone method) to obtain an image of the atom's neighboring carbon. The chemisorbed acetylene molecule is bonded to four silicon surface atoms. In contrast to the C2H2 case, the image for adsorbed C2H4 shows it bonded to two Si surface atoms.
authors.affiliation: Department of Physics, Montana State University, Bozeman, Montana 59717-3840, USA.
authors.initials: SH
authors.lastname: Xu
authors.initials: M
authors.lastname: Keeffe
authors.initials: Y
authors.lastname: Yang
authors.initials: C
authors.lastname: Chen
authors.initials: M
authors.lastname: Yu
authors.initials: GJ
authors.lastname: Lapeyre
authors.initials: E
authors.lastname: Rotenberg
authors.initials: J
authors.lastname: Denlinger
authors.initials: JT
authors.lastname: Yates