Interface Analysis of Al2O3/InP Structure Prepared by Molecular Beam Deposition

Abstract
We have applied disorder-sensitive high-energy ion scattering together with the C-V method to an interface study of Al2O3/InP, which was prepared with well-controlled molecular beam deposition. Low interface state densities (the minimum value near the midgap is ∼1×1011cm-2eV-1) have been obtained in the present work. Measurements of the interface disorder for these samples suggest that there is a correlation between the interface state density and the interface disorder. It is necessary to lower the interface disorder to obtain low interface state densities.