Damage Profile in GaAs, AlAs, AlGaAs, and GaAs/AlGaAs Superlattices Induced by Si+-Ion Implantation

Abstract
Rutherford backscattering of 2-MeV He+ with channeling was used to study the damage distribution produced in GaAs, AlAs, Al0.4Ga0.6As, and GaAs/Al x Ga1-x As superlattices by Si+-ion implantation. The results indicate that (1) the amount of damage in Al0.4Ga0.6As is less than that in GaAs, although that in AlAs is almost the same as that in GaAs, and (2) GaAs layers are selectively damaged in superlattice structures independent of Al composition in Al x Ga1-x As.