The surface structure of the strain-stabilized anion-terminated monolayer zincblende (100) surface was studied by using the local-orbital density-functional molecular dynamics method. By analogy with the (100) GaAs surface, 4 structural models were considered and it was found that the structure with a 2 x 4 unit cell, in which there were 2-dimer units and 2-shifted dimer units, was the most favourable. The results could be explained in terms of the physical properties which were associated with ionicity.

C.M.Lin, M.H.Tsai, T.J.Yang, D.S.Chuu: Physical Review B, 1997, 56[15], 9209-12