HOLOGRAPHIC IMAGES OF IODINE ATOMS ON A SILVER SURFACE FROM ELECTRON-EMISSION PATTERNS

P. Hu, DA KING, Peijun Hu

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

BARTON 1 has suggested that photoelectron interference patterns may be used directly as holograms to obtain atomic-resolution images of surface structures. Bulk structures have been obtained previously by this means from experimental patterns of high-energy Kikuchi(quasi-elastically scattered) and Auger electrons 2,3. Here we test the feasibility of this technique for determination of surface structures using Auger intensity patterns obtained 4,5 from iodine chemisorbed on a pseudomorphic silver monolayer on Pt{111}. By direct numerical holographic inversion, we obtain three-dimensional images which show that iodine adatoms are located in hollows of 3-fold symmetry on the surface. The images yield the site symmetry with good atomic resolution in the surface plane, but suffer from poor resolution along the Ag-I axis. We anticipate that data with better angular resolution obtained at low temperatures would improve the spatial resolution of such images.

Original languageEnglish
Pages (from-to)831-833
Number of pages3
JournalNature
Volume353
Issue number6347
Publication statusPublished - 31 Oct 1991

Keywords

  • PHOTOELECTRON DIFFRACTION
  • SPECTROSCOPY
  • RESOLUTION
  • LEED
  • PT(111)
  • AG(111)

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