We have investigated the two-domain (2 x 1)-reconstructed 3C-SiC(001) surfa
ce using angle-resolved inverse photoemission. An unoccupied surface state
band at E-SS = 2.0 eV with respect to the valence band maximum (VBM) at the
<(<Gamma>)over bar> point is completely located within the bulk band gap.
Further, an unoccupied surface resonance at E-SR = 3.6 eV above VBM is obse
rved. Both surface structures show no dispersion in <(<Gamma>J)over bar> an
d <(<Gamma>J ' )over bar> directions, respectively. The energetic position
of both is in good agreement with LDA surface band structure calculations.
However, LDA calculations predict a dispersion of about 0.8-1.0 eV for the
surface state band and about 0.5-0.8 eV for the surface resonance band, whi
le experimentally no dispersion in <(<Gamma>J)over bar> and <(<Gamma>J ' )o
ver bar> directions is observed. (C) 2001 Elsevier Science B.V. All rights
reserved.