COMPOSITION AND STRUCTURE OF BETA-SIC(100)-(2X2) SURFACES MONITORED BY PHOTOEMISSION SPECTROSCOPY USING SYNCHROTRON-RADIATION

We investigate the single domain beta-SiC(100)-(2 x 1) surface reconst ruction by core level and valence band photoemission spectroscopies us ing synchrotron radiation. Specific spectral features at the Si 2p and C 1s core levels including bulk and surface core level shifts, and in the valence band, bring experimental evidence of reproducible beta-Si C(100)-(2 x 1) structures having different Si/C compositions ranging f rom Si-terminated to Si- + C-containing surfaces.