FIM observation of A Ga(3 × 3) superstructure on W and Mo(011)

FIM observation has revealed that the atomic arrangement of a monoatomic Ga layer on the W and Mo(011) plane is the (3 × 3) superstructure formed by zigzag chains of Ga atoms. Observed images indicate that the Ga atoms of the zigzag chains are displaced in the [01̄1] or [011̄] direction from an open W lattice site to the position where the displaced atom is stabilized by contacting three substrate W atoms.