Binding energy of impurity states in a parabolic quantum dot in a strong magnetic field

2005 ◽  
Vol 242 (12) ◽  
pp. 2480-2488 ◽  
Author(s):  
A. John Peter ◽  
K. Gnanasekar ◽  
K. Navaneethakrishnan
Keyword(s):  
Magnetic Field ◽  
Binding Energy ◽  
Quantum Dot ◽  
Strong Magnetic Field ◽  
Impurity States ◽  
Parabolic Quantum Dot

EXCITATION SPECTRUM OF QUANTUM DOT IN STRONG MAGNETIC FIELD

1995 ◽  
Vol 09 (15) ◽  
pp. 1843-1867 ◽  
Author(s):  
AL. A. ANDREEV ◽  
YA. M. BLANTER ◽  
YU. E. LOZOVIK
Keyword(s):  
Magnetic Field ◽  
Perturbation Theory ◽  
Quantum Dot ◽  
Strong Magnetic Field ◽  
Microscopic Theory ◽  
Collective Excitations ◽  
Complete Analysis ◽  
Classical Approach ◽  
Particle Drift ◽  
Parabolic Quantum Dot

Microscopic theory of collective excitations of a quantum dot in a strong magnetic field is proposed. A complete analysis of diagrams in the perturbation theory over the Coulomb interaction is performed. The spectrum of low-lying excitations is calculated for the case of a parabolic quantum dot. It is shown to consist of three terms: single-particle drift, magnetoplasma and exciton ones, with the exciton term dominating the magnetoplasma one. In the framework of the semi-classical approach, the case of a non-parabolic quantum dot is also discussed. The experimental manifestations of the effects under investigation are discussed.

IMPURITY LEVELS IN A PARABOLIC QUANTUM DOT UNDER ACTION OF A STRONG MAGNETIC FIELD

2001 ◽  
Vol 15 (31) ◽  
pp. 4103-4110 ◽  
Author(s):  
E. M. KAZARYAN ◽  
L. S. PETROSYAN ◽  
H. A. SARKISYAN
Keyword(s):  
Magnetic Field ◽  
Energy Level ◽  
Quantum Dot ◽  
Excited States ◽  
Adiabatic Approximation ◽  
Impurity States ◽  
Parabolic Confinement ◽  
Analytical Expressions ◽  
Ground Energy ◽  
Parabolic Quantum Dot

The impurity states in quantum dot with parabolic confinement were studied in adiabatic approximation. The analytical expressions for the energy of ground and excited states were obtained. It was shown, that the influence of walls results in raising the ground energy level.

EFFECT OF MAGNETIC FIELDS ON BINDING ENERGY OF IMPURITY STATES IN A SEMIMAGNETIC PARABOLIC QUANTUM DOT

2007 ◽  
Vol 21 (17) ◽  
pp. 3035-3044 ◽  
Author(s):  
A. JOHN PETER
Keyword(s):  
Magnetic Field ◽  
Binding Energy ◽  
Quantum Dot ◽  
Mean Field Theory ◽  
Mean Field ◽  
Realistic Model ◽  
Mass Approximation ◽  
Maximum Value ◽  
The Magnetic Field ◽  
Parabolic Quantum Dot

Using a variational approach, the binding energy of shallow hydrogenic impurities in a semimagnetic parabolic quantum dot is calculated within the effective mass approximation. The binding energy is computed for Cd 1-x in Mn x in Te / Cd 1-x out Mn x out Te structures as a function of the dot size in an external magnetic field. The results show that the impurity binding energy (i) increases with the reduction in dot sizes (ii) decreases when the magnetic field is increased for a given dot and (iii) increases to a maximum value at 100 Å and then decreases as the size of the dot increases beyond 100 Å for a realistic model. Spin polaronic shifts are estimated using a mean field theory. These results are compared with the existing literatures.

TEMPERATURE EFFECT ON IMPURITY-BOUND POLARONIC ENERGY LEVELS IN A PARABOLIC QUANTUM DOT IN MAGNETIC FIELDS

2007 ◽  
Vol 21 (32) ◽  
pp. 5331-5337 ◽  
Author(s):  
SHI-HUA CHEN ◽  
JING-LIN XIAO
Keyword(s):  
Magnetic Field ◽  
Perturbation Theory ◽  
Binding Energy ◽  
Magnetic Fields ◽  
Quantum Dot ◽  
Temperature Effect ◽  
Applied Magnetic Field ◽  
Energy Levels ◽  
Schrödinger Perturbation ◽  
Parabolic Quantum Dot

Energy levels of an impurity atom and its binding energy in a quantum dot with electron–phonon interactions are obtained by the second-order Rayleigh–Schrodinger perturbation theory. The energy correction is expressed as a function of the temperature, the applied magnetic field, and the effective confinement length of the quantum dot. We apply our calculations to GaAs .

Perturbation Theory for Interacting Electrons in a Quantum Dot under Strong Magnetic Field

2001 ◽  
Vol 35 (2) ◽  
pp. 245-250
Author(s):  
Gu Yun-Ting ◽  
Ruan Wen-Ying ◽  
Li Quan ◽  
Cai Min ◽  
Chan Kok-Sam
Keyword(s):  
Magnetic Field ◽  
Perturbation Theory ◽  
Quantum Dot ◽  
Strong Magnetic Field ◽  
Interacting Electrons
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