Sound-Wave-Like Collective Electronic Excitations in Au Atom Chains

DOI Web Site Web Site 2 Citations 37 References
  • Nagao Tadaaki
    Nano System Functionality Center, National Institute for Materials Science ICORP, Japan Science and Technology Agency (JST)
  • Yaginuma Shin
    Nano System Functionality Center, National Institute for Materials Science
  • Inaoka Takeshi
    Department of Materials Science and Engineering, Iwate University
  • Sakurai Toshio
    Institute for Materials Research, Tohoku University
  • Jeon Dongryul
    Department of Physics Education, Seoul National University

Search this article

Abstract

Sound-wave-like collective excitation in Au atom chains on the Si(557) surface is investigated. Electron scattering spectroscopy using a highly collimated slow electron beam has detected a characteristic low-energy one-dimensional (1D) plasmon (wire plasmon) that is confined in the atom chains. Theoretical analysis adopting a quantum-mechanical scheme beyond the free-electron model indicates a significant dynamic exchange-correlation effect due to strong 1D confinement. By cooling to below 100 K, we have detected for the first time a significant change in the plasmon dispersion in a tiny momentum and energy region, which definitely reflects a gap opening due to a metal-to-insulator transition of the atom chains.

Journal

Citations (2)*help

See more

References(37)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top