Photoelectron Spectroscopy on Reconstructed GaSb(001)

摘要

Various reconstructed GaSb(001) surfaces were prepared and investigated in situ using core-level photoelectron spectroscopy. The change in the surface components of the Ga 3d and Sb 4d revealed that Ga atom rows are not necessary for formation of the c(2 x 6) surface. A new model is proposed in which the origin of the x3 periodicity along the [-110] direction is due to Sb-dimer rows. Another is proposed for the changing of the surface structure from a c(2 x 6) surface to a Ga-rich 2 x 3 surface; this model accounts for the appearance of a surface component in the Ga 3d corresponding to the Ga atom rows under Ga-rich conditions.