Impurity In Spherical Quantum Dot Research Articles

Polaronic Effect on the Ground-State Energy of an Electron Bound to an Impurity in Spherical Quantum Dots

Using a variational approach and the modified Lee-Low-Pines transformation the binding energy of an on-center hydrogenic impurity in quasi-zero-dimensional spherical Quantum Dots (QD) interacting with confined LO phonon and SO phonon is calculated. The result shows that the LO-phonon effects are more important than SO-phonon effects, and they are more significant for small radius (R) of the QD.

Polaronic Effect on the Ground-State Energy of an Electron Bound to an Impurity in Spherical Quantum Dots

Polaronic Effect on the Ground-State Energy of an Electron Bound to an Impurity in Spherical Quantum Dots

Binding energy of impurity states in spherical quantum dots with parabolic confinement

The binding energy of shallow hydrogenic impurities in spherical quantum dots (QDs) with parabolic confinement is calculated, using a variational approach within the effective mass approximation. The binding energy is computed for GaAs QD as a function of the dot size for different impurity positions, and also as a function of the impurity position for different dot sizes. The results show that the impurity binding energy increases with the reduction in the dot dimension. The binding energy is also found to depend on the location of the impurity, and the same is the maximum for the on-center impurity.