Photoemission from surface-localized structures on vicinal surfaces: Initial- or final-state superlattice effect?

Research output: Contribution to journalArticle

Abstract

Strong superlattice effects are reported on E(k(vertical bar vertical bar)) band dispersions measured by angle-resolved photoemission on W(3 3 1) and W(5 5 1), and graphene nanostripes on Ni(7 7 1). A splitting of the dispersions with reciprocal superlattice vector G = 2 pi/L is observed for a surface resonance on W(3 3 1) and W(5 5 1) and for pi-states of graphene/Ni(7 7 1). Photon-energy-dependent measurements and comparison to LEED show that electrons are confined to the one-dimensional terraces and stripes, respectively, and that the observed superlattice effects are due to diffraction in the final state of the photoemission transitions.

Details

Authors
  • AM Shikin
  • A Varykhalov
  • Serguei Gorovikov
  • GV Prudnikova
  • VK Adamchuk
  • KH Rieder
  • W Gudat
  • O Rader
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Natural Sciences
  • Physical Sciences

Keywords

  • graphite, dispersion, final-state effect, photoemission, diffraction, stepped surface, tungsten
Original languageEnglish
Pages (from-to)625-628
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume144-147
Publication statusPublished - 2005
Publication categoryResearch
Peer-reviewedYes