Azimuthal dependence of the electronic excitations in GaAs(110)

Abstract An azimuthal dependent study of the electronic properties of the GaAs(110) surface by high resolution electron energy loss spectroscopy is presented. The relative weight of surface and bulk contributions to the loss spectrum is discussed. A minor anisotropy of almost all the identified structures, which are superimposed onto a rather isotropic background of transitions across the bulk gap, is found.