Structural and electronic characterisation of Cu/Au(111) near-surface alloys

Federico Grillo, Rory Megginson, David Batchelor, Matthias Muntwiler, Christopher J. Baddeley

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
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Abstract

Geometrical structure and electronic characteristics of ultrathin metallic films of one metal on another are strongly influenced by factors such as lattice mismatch and formation of near-surface alloys. Doped systems often show modified chemical-physical properties which may be amenable to different reactivity routes. Copper-gold surface alloys have received the attention of several studies, only a few of which have been undertaken in an UHV environment, using surface sensitive techniques. In this contribution, systems produced upon room temperature deposition of copper on the (22×√3)-Au(111) surface, at various copper loadings and annealed to different temperatures, are investigated using scanning tunnelling microscopy and synchrotron radiation based techniques (X-ray photoelectron diffraction, photoemission), with comparison with some theoretical modelling. Overall the fcc lattice is essentially maintained on preparation. Upon thermal treatments structural and compositional changes, in favour of alloyed structures with tetragonal packing, are seen.
Original languageEnglish
Article numberSIIB09
Number of pages5
JournalJapanese Journal of Applied Physics
Volume58
Issue numberSI
DOIs
Publication statusPublished - 18 Jun 2019
Event14th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures - Sendai International Center, Sendai, Japan
Duration: 21 Oct 201825 Oct 2018
Conference number: 14
https://dora.bk.tsukuba.ac.jp/event/acsin14/

Keywords

  • X-ray Photoelectron Diffraction (XPD)
  • Surface alloys
  • Synchrotron
  • Photoemission, Scanning Tunnelling Microscopy (STM)

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