Dispersion of surface states on diamond (100) and (111)

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Ristein J, Ley L
Zeitschrift: Physical Review B
Verlag: American Physical Society
Jahr der Veröffentlichung: 1997
Band: 55
Seitenbereich: 10841
ISSN: 0163-1829


We present angle-resolved photoelectron spectra and surface state dispersions for the clean, 2x1 reconstructed (111) and (100) surfaces of diamond. For the (100) surface a surface state is found in the gap of the projected bulk band structure around Ȳ, which has a binding energy of 2.7 eV at Ȳ (relative to the Fermi level) and a dispersion in the Γ̄-Ȳ direction of 0.5 eV, consistent with theory. At Γ̄ a surface resonance is observed at 1.4 eV binding energy. No surface states were observed above the valence-band maximum. Our results on the (111) surface show a strongly dispersing surface state that reaches its maximum 0.5 eV below the Fermi level at K̄. This result implies a gap of at least 0.5 eV in the surface electronic structure, which has consequences for the surface reconstruction in terms of a π-bonded chain model.

FAU-Autoren / FAU-Herausgeber

Ley, Lothar Prof. Dr.
Naturwissenschaftliche Fakultät
Ristein, Jürgen apl. Prof. Dr.
Lehrstuhl für Laserphysik

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