Surface enhanced covalency and its effect on the surface states of d-band metal oxides

Wolfram T., Ellialtıoğlu S. Ş.

Applied Physics, cilt.13, sa.1, ss.21-24, 1977 (Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 1
  • Basım Tarihi: 1977
  • Doi Numarası: 10.1007/bf00890714
  • Dergi Adı: Applied Physics
  • Derginin Tarandığı İndeksler: Scopus
  • Sayfa Sayıları: ss.21-24
  • Anahtar Kelimeler: 82.65
  • TED Üniversitesi Adresli: Hayır

Özet

The effect of electron-electron interactions on the surface states of ionic d-band oxides is reported. The local density of states of surface cations in the valence band region is significantly increased when surface states occur in the band gap. Coulomb repulsion associated with this surface enhanced covalency tends to force surface states out of the band gap. These results suggest an explanation of recent experiments on SrTiO3 and TiO2. © 1977 Springer-Verlag.