Structural and dynamical properties of As overlayers on the GaAs(1 1 0) surface

We present structural and dynamical properties of the As covered GaAs(1 1 0) surface based on ab initio density-functional calculations and a linear-response approach. Characteristic phonon modes due to a monolayer deposition of As within the epitaxially continued layer structure have been identified and compared with their counterparts on the clean GaAs(1 1 0) surface.