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Adsorption-induced gap states of h-BN on metal surfaces

In English

Författare

  • Alexei Preobrajenski
  • S. A. Krasnikov
  • A. S. Vinogradov
  • May Ling Ng
  • Tanel Käämbre
  • A. A. Cafolla
  • Nils Mårtensson

Summary, in English

The formation of hexagonal boron nitride (h-BN) monolayers on Ni(111), Rh(111), and Pt(111) has been studied by a combination of x-ray emission, angle-resolved valence band photoemission, and x-ray absorption in search for interface-induced gap states of h-BN. A significant density of both occupied and unoccupied gap states with N 2p and B 2p characters is observed for h-BN/Ni(111), somewhat less for h-BN/Rh(111) and still less for h-BN/Pt(111). X-ray emission shows that the h-BN monolayer is chemisorbed strongly on Ni(111) and very weakly on Pt(111). We associate the gap states of h-BN adsorbed on the transition metal surfaces with the orbital mixing and electron sharing at the interface because their density increases with the growing strength of chemisorption.

Publiceringsår

2008

Språk

Engelska

Sidor

1-085421

Publikation/Tidskrift/Serie

Physical Review B

Volym

77

Issue

8

Dokumenttyp

Artikel i tidskrift

Förlag

American Physical Society

Ämne

  • Physical Sciences
  • Natural Sciences

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1550-235X