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Sökning: id:"swepub:oai:DiVA.org:kth-83034" > Reconstruction of t...

  • Gauthier, Y. (författare)

Reconstruction of the Pt50Ni50(100) surface : a LEED and STM study

  • Artikel/kapitelEngelska1995

Förlag, utgivningsår, omfång ...

  • 1995
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-83034
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-83034URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Correspondence Address: Gauthier, Y.; Laboratoire de Cristallographie, CNRS, BP 166 X, 38042 Grenoble Cedex 09, France; email: rsmy213@idris.fr NR 20140805
  • The structure of the Pt50Ni50(100) surface was investigated by low energy electron diffraction (LEED) and scanning tunnelling spectroscopy (STM). Superstructures corresponding to 12 × 1 and 19 × 1 reconstructions were observed in the LEED pattern, and these reconstructions were identified with atomic resolution by STM. The reconstructed surface layer has a quasi-hexagonal atomic mesh with almost (111) atomic density and is divided into terraces and domains the size of which can be more than a thousand Ã¥ngströms. The domains are corrugated with protrusions made up by 5 × 1 subunits of the quasi-hexagonal mesh and with valleys containing depressed atoms or 2 × 1 subunits. The 12 × 1 and 19 × 1 periodicities are determined by the sequence of valleys; depending on the thermal treatment, one or the other dominates but both generally coexist on the terrace. Owing to the complexity of the structure, LEED calculations were performed for a simplified model with surface atoms situated in a planar net and uniform quasi-hexagonal meshes. We find that in both reconstructions the two surface layers are significantly enriched with platinum. The top layer enrichment is consistent with previous Auger measurements. © 1995.

Ämnesord och genrebeteckningar

  • NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
  • NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
  • Alloys
  • Low energy electron diffraction (LEED)
  • Low index single crystal surfaces
  • Scanning tunneling microscopy
  • Surface relaxation and reconstruction
  • Surface segregation
  • Surface structure
  • morphology
  • roughness
  • and topography
  • Atoms
  • Calculations
  • Heat treatment
  • Low energy electron diffraction
  • Morphology
  • Platinum alloys
  • Relaxation processes
  • Single crystals
  • Surface roughness
  • Atomic density
  • Atomic resolution
  • Quasi hexagonal atomic mesh
  • Surface reconstruction
  • Surface relaxation
  • Surface topography
  • Surface structure

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Baudoing-Savois, R. (författare)
  • Rundgren, J. (författare)
  • Hammar, M.KTH,Fysik (författare)
  • Göthelid, M. (författare)
  • KTHFysik (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Surface Science327:1-2, s. 100-1200039-6028

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