External Electric Field Effect on Shallow Donor Impurity States in Zinc-Blende In_xGa_1−xN/GaN Symmetric Coupled Quantum Dots

Figure 1

A diagram of a cylindrical ZB /GaN symmetric coupled QDs of the radius , the left dot height , the middle barrier width , and the right dot height . The -axis is defined to be the growth direction of the SCQDs, and the external electric field is applied along -axis of the coupled QDs.