Electronic states of NbB2(0001), TaB2(0001) and ZrB2(0001) surfaces studied by angle-resolved ultraviolet photoelectron spectroscopy

S. Kumashiro, H. Tanaka, Y. Kawamata, H. Yanagisawa, K. Momose, G. Nakamura, C. Oshima, S. Otani

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have investigated the surface electronic structures of transition-metal diboride (0001) surfaces by angle-resolved ultraviolet photoelectron spectroscopy (AR.UPS) and ab-initio calculations based on the slab model with 13 layers. In the spectra of NbB2 and TaB2, the peaks near -1 eV blow EF are derived from the π band of their surface graphitic boron layer. As compared with graphene, the dispersion curves of the π bonds are greatly modulated by the hybridization of B-π orbits with the metal d orbits. On the other hand, the similar peaks were not observed in spectra of ZrB2, of which the surface is terminated with Zr atoms.

Original languageEnglish
Pages (from-to)100-104
Number of pages5
Journale-Journal of Surface Science and Nanotechnology
Volume4
DOIs
Publication statusPublished - 2006 Jan 19

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Ultraviolet photoelectron spectroscopy
Photoelectron Spectroscopy
ultraviolet spectroscopy
Electronic states
Orbit
Metals
photoelectron spectroscopy
Boron
Graphite
electronics
Orbits
orbits
Graphene
Electronic structure
Transition metals
graphene
boron
slabs
transition metals
electronic structure

Keywords

  • Ab-initio calculations
  • Angle-resolved ultraviolet photoelectron spectroscopy
  • Electronic structure
  • Transition-metal diboride

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Materials Science (miscellaneous)

Cite this

Electronic states of NbB2(0001), TaB2(0001) and ZrB2(0001) surfaces studied by angle-resolved ultraviolet photoelectron spectroscopy. / Kumashiro, S.; Tanaka, H.; Kawamata, Y.; Yanagisawa, H.; Momose, K.; Nakamura, G.; Oshima, C.; Otani, S.

In: e-Journal of Surface Science and Nanotechnology, Vol. 4, 19.01.2006, p. 100-104.

Research output: Contribution to journalArticle

Kumashiro, S. ; Tanaka, H. ; Kawamata, Y. ; Yanagisawa, H. ; Momose, K. ; Nakamura, G. ; Oshima, C. ; Otani, S. / Electronic states of NbB2(0001), TaB2(0001) and ZrB2(0001) surfaces studied by angle-resolved ultraviolet photoelectron spectroscopy. In: e-Journal of Surface Science and Nanotechnology. 2006 ; Vol. 4. pp. 100-104.
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AU - Tanaka, H.

AU - Kawamata, Y.

AU - Yanagisawa, H.

AU - Momose, K.

AU - Nakamura, G.

AU - Oshima, C.

AU - Otani, S.

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