Cation-anion mixed-dimer structure of Al-induced (2×4) reconstruction on InAs(001)

摘要

Adsorption of Al atoms on the As-stabilized InAs(001)-(2×4) surface induces the formation of the Al-stabilized (2×4) reconstruction. The Al-stabilized (2×4) surface has mixed In-As dimer at the outermost layer with the Al atoms being incorporated into the subsurface layers. Heating of the Al-stabilized (2×4) surface further promotes the diffusion of Al into deeper layers, which results in the formation of the In-rich (4×2) structure with the ζa structure.