Effect of Electron–Electron Interactions in a Parabolic Quantum Dot Under the Influence of Magnetic Field

2009 ◽  
Vol 6 (5) ◽  
pp. 1131-1135
Author(s):  
A. John Peter ◽  
S. Saravanakumar
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Parabolic Quantum Dot ◽  
Electron Interactions

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.

scholarly journals The Effects of Pressure and Temperature on the Magnetic Susceptibility of Semiconductor Quantum Dot in A Magnetic Field

2017 ◽  
Vol 9 (1) ◽  
pp. 77 ◽  
Author(s):  
Faten BZOUR ◽  
Mohammad K. ELSAID ◽  
Ayham SHAER
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Quantum Dot ◽  
Theoretical Study ◽  
External Pressure ◽  
Diagonalization Method ◽  
Electron Quantum ◽  
Exact Diagonalization Method ◽  
Good Agreement ◽  
Parabolic Quantum Dot

In this work, we present a theoretical study of the magnetic susceptibility (x of two-electron GaAs parabolic quantum dot (QD) under the combined effects of external pressure, temperature and magnetic field. We used the exact diagonalization method to obtain the eigenenergies by solving the two electron quantum dot Hamiltonian taking into account the dependence of the effective mass and dielectric constant on the hydrostatic pressure and temperature. The pressure and temperature show significant effects on the calculated QD spectra. Next, we investigate the behavior of the magnetization of a quantum dot as a function of external pressure, temperature, confining frequency and magnetic field. The singlet-triplet transitions in the ground state of the quantum dot spectra and the corresponding jumps in the magnetic susceptibility spectra have been shown. The comparison shows that our results are in very good agreement with the reported works.

The electron Raman scattering in the spherical parabolic quantum dot in the present of magnetic field

2013 ◽  
Vol 49 ◽  
pp. 325-331 ◽  
Author(s):  
S.H. Rezaiee ◽  
H.R. Askari ◽  
M. Rahimi ◽  
A. Fatemidokht
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Raman Scattering ◽  
Parabolic Quantum Dot
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