Two dimensional electron gas mobility limited by scattering of quantum dots with indium composition transition region in quantum wells

A modified quantum dots (QDs) structure model is developed in this study. Compared with the traditional model, the gradual composition transition at the interface between the QDs and matrix is taken into account in the modified model. Two dimensional electron gas (2DEG) mobility limited by QDs scattering is studied based on the modified model. The result is compared with the one based on the traditional model. It is found that the contribution of the gradual composition transition region to the electron mobility is too significant to be negligible, especially in the case of high 2DEG density or small QDs radius.