The structure of the Si-rich (00•1) surface of 6H-type material was investigated by means of scanning tunnelling microscopy and low-energy electron diffraction. A surface phase was observed which had a 2v3 x 2v13 periodicity that co-existed with the known stable (3 x 3) phase on a surface which was obtained by annealing the (3 x 3) surface at 800C. A structural model was proposed, which contained eight Si adatoms per unit cell on the Si adlayer, and which was consistent with the scanning tunnelling microscopic images and with the extension of the (3 x 3) model structure.

A (2v3 x 2v13) Surface Phase in the 6H-SiC(0001) Surface Studied by Scanning Tunnelling Microscopy M.Naitoh, J.Takami, S.Nishigaki, N.Toyama: Applied Physics Letters, 1999, 75[5], 650-2