Binding energy of an off-center hydrogenic donor in a spherical quantum dot with strong parabolic confinement

2008 ◽  
Vol 41 (1) ◽  
pp. 41-44 ◽  
Author(s):  
Jian-Hui Yuan ◽  
Chao Liu
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Spherical Quantum Dot ◽  
Hydrogenic Donor ◽  
Parabolic Confinement

Effect of electric field, dielectric screening and conduction band nonparabolicity of donor in a quantum dot

2018 ◽  
Vol 32 (10) ◽  
pp. 1850122 ◽  
Author(s):  
A. Rejo Jeice ◽  
Sr. Gerardin Jayam ◽  
K. S. Joseph Wilson
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Electric Field ◽  
Conduction Band ◽  
Spherical Quantum Dot ◽  
Donor Binding Energy ◽  
Hydrogenic Donor ◽  
Dielectric Screening ◽  
Parabolic Confinement ◽  
Band Nonparabolicity

The effect of electric field, dielectric screening, conduction band nonparabolicity and effective mass mismatch of a hydrogenic donor in a GaAs/Ga[Formula: see text]Al[Formula: see text]As spherical quantum dot is investigated by assuming parabolic confinement using variational method. In the present work we obtain the increase of binding energy by decreasing the dot size for certain dot radii (50 Å) and the screening function gives uniformly larger values for smaller dot size. The effect of electric field and temperature decrease the donor binding energy whereas the conduction band nonparabolicity leads to increased binding energy.

THE EFFECTS OF QUANTUM CONFINEMENT ON THE BINDING ENERGY OF HYDROGENIC IMPURITIES IN A SPHERICAL QUANTUM DOT

2006 ◽  
Vol 20 (18) ◽  
pp. 1127-1134 ◽  
Author(s):  
A. JOHN PETER
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Shallow Donor ◽  
Donor Impurity ◽  
Hydrogenic Impurity ◽  
Spherical Quantum Dot ◽  
Impurity Position ◽  
Mass Approximation ◽  
Donor Binding Energy ◽  
Parabolic Confinement

The binding energy of a shallow hydrogenic impurity of a spherical quantum dot confined by harmonic oscillator-like and by rectangular well-like potentials, using a variational procedure within the effective mass approximation, has been determined. The calculations of the binding energy of the donor impurity as a function of the system geometry, and the donor impurity position have been investigated. The binding energy of shallow donor impurity depends not only on the quantum confinements but also on the impurity position. Our results reveal that (i) the donor binding energy decreases as the dot size increases irrespective of the impurity position, and (ii) the binding energy values of rectangular confinement are larger than the values of parabolic confinement and (iii) the rectangular confinement is better than the parabolic confinement in a spherical quantum dot.

Spectrum and Binding Energy of an Off-Center Hydrogenic Donor in a Spherical Quantum Dot

2010 ◽  
Vol 54 (2) ◽  
pp. 369-372 ◽  
Author(s):  
Yuan Jian-Hui ◽  
Huang Jin-Sheng ◽  
Yin Miao ◽  
Zeng Qi-Jun ◽  
Zhang Jun-Pei
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Spherical Quantum Dot ◽  
Hydrogenic Donor
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