Bonding direction and surface-structure orientation on GaAs (001)

Abstract

An experimental study to determine the orientation of surface structures with respect to atomic-bond direction is presented. The As-stabilized (2×4) and C(2×8), and Ga-stabilized (4×2) and C(8×2) surface structures all have their twofold direction parallel to the plane containing the dangling surface bonds and perpendicular to that of the back bonds.