An investigation was made of the 6H-SiC(00•1) 3 x 3 surface reconstruction via Si 2p and C 1s core-level photo-emission spectroscopy using synchrotron radiation providing the first identification of surface core-level shifted components. Specific spectral features at the Si 2p core level, including bulk and two surface shifted (SS1 and SS2) components, revealed a surface reconstruction structure involving several silicon atomic planes. In comparison, the C 1s core level revealed no involvement of carbon atoms in the 6H-SiC(00•1) 3 x 3 surface reconstruction structure. These results, obtained by an attenuation layer model, indicated that SS1 was related to the Si adatom and that SS2 was related to the Si adlayer+trimer of the 6H-SiC(00•1) 3 x 3 surface reconstruction.

Identification of the 6H-SiC(0001) 3 x 3 Surface Reconstruction Core-Level Shifted Components. F.Amy, P.Soukiassian, Y.K.Hwu, C.Brylinski: Surface Science, 2000, 464[1], L691-6