Fk. Men et Jl. Erskine, METASTABLE OXYGEN-INDUCED ORDERED STRUCTURE ON THE SI(001) SURFACE, Physical review. B, Condensed matter, 50(15), 1994, pp. 11200-11203
We report an oxygen-induced metastable ordered structure on a Si(001)
surface. The c(4X4) structure is obtained after extensive annealing of
a clean Si(001)-2X1 surface dosed with oxygen at room temperature. Th
is c(4X4) structure appears only after the completion of the 2X1 struc
ture, which disappears in the early annealing stage. The c(4X4) struct
ure reverts back irreversibly to the 2X1 structure after the surface i
s heated to above 720 degrees C. Possible structural models for the c(
4X4) reconstruction are discussed.