| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1545218 | Physica E: Low-dimensional Systems and Nanostructures | 2011 | 4 Pages |
The off-diagonal element of the Luttinger Hamiltonian responsible for the coupling of heavy hole–light hole states has been calculated for symmetric/asymmetric semiconductor quantum dots. It has been found that the splitting arising due to finite off-diagonal elements of the Luttinger Hamiltonian and the size asymmetry of the quantum dot is counterbalanced. The numerical estimates made for CdSe/ZnSe quantum dot manifest minimal energy splitting when the size asymmetry parameter is around 0.3.
Graphical abstractThe off-diagonal element of the Luttinger Hamiltonian responsible for the coupling of heavy hole–light hole states has been calculated for symmetric/asymmetric semiconductor quantum dots. It has been found that the splitting arising due to off-diagonal elements of the Luttinger Hamiltonian and the size asymmetry of the quantum dot is counterbalanced. Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Using envelope function approximation, hybrid valence band splitting in asymmetric QD is observed. ► The off-diagonal element is calculated for symmetric/asymmetric semiconductor quantum dots. ► Splitting due to quantum dot size asymmetry sets against the intrinsic splitting. ► Numerical estimates for CdSe/ZnSe QD manifest minimal energy splitting at A=0.3.
