A new proposed method for determining inner or outer crossing lattice relaxation of DX centers in Al xGa l−xAs based on pressure effects

Abstract

It is proposed that hydrostatic pressure measurements can be used to settle the recent controversies surrounding the model of the DX center in Al xGa l−xAs alloy. The method can in general distinguish the two possible cases of lattice relaxations in defect configuration coordinate diagrams: one with large lattice relaxation which we labelled as “outer crossing,” and the other with small lattice relaxation labelled as “inner crossing”.