title: The excitation of one-dimensional plasmons in Si and Au-Si complex atom wires.
abstract: An atom-scale quantum wire array at the Au adsorbed Si(111) surface is studied by electron energy loss spectroscopy. Clear one-dimensional metallicity is verified by the observation of low-energy plasmonic excitation which exhibits a strong anisotropic dispersion. Our theoretical analysis using a quantum-mechanical nonlocal response theory shows that the plasmons are most probably supported in conductive channels made of Si honeycomb wires rather than those made of Au-Si complex wires.
authors.affiliation: International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan.
authors.forename: Canhua
authors.initials: C
authors.lastname: Liu
authors.forename: Takeshi
authors.initials: T
authors.lastname: Inaoka
authors.forename: Shin
authors.initials: S
authors.lastname: Yaginuma
authors.forename: Tomonobu
authors.initials: T
authors.lastname: Nakayama
authors.forename: Masakazu
authors.initials: M
authors.lastname: Aono
authors.forename: Tadaaki
authors.initials: T
authors.lastname: Nagao