EFFECTS OF CONFINEMENT POTENTIAL ON FEW-ELECTRON QUANTUM DOTS IN MAGNETIC FIELD

2010 ◽  
Vol 24 (16) ◽  
pp. 1791-1797
Author(s):  
XIAO-ZHU LI ◽  
YI-MIN LIU
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Regular Polygon ◽  
Ground States ◽  
Energy Spectra ◽  
State Transitions ◽  
Confinement Potential ◽  
Electron Quantum ◽  
Electronic Configurations ◽  
Symmetry Effect

Effects of confinement potential hω0 on two- and four-electron quantum dots (QDs) subjected to an external magnetic field B are theoretically investigated. The energy spectra of low-lying states of the QDs as a function of B are obtained. The (L0, S0) phase diagrams are presented, indicating how the ground-state transitions of the QDs vary with B and hω0, where L0 denotes the total angular momentum and S0 the total spin of the ground states. Arising from symmetry effect, L0 and S0 are matched with each other in a special way. Density functions are calculated, and information on electronic configurations is extracted from them. The ground states are found to have a regular-polygon configuration.

scholarly journals Two-Electron Quantum Dots in Magnetic Field

1997 ◽  
Vol 92 (4) ◽  
pp. 695-698
Author(s):  
J. Adamowski ◽  
B. Spisak
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Electron Quantum

The magnetization and magnetic susceptibility of GaAs Gaussian quantum dot with donor impurity in a magnetic field

2019 ◽  
Vol 33 (34) ◽  
pp. 1950422 ◽  
Author(s):  
Mohammad Elsaid ◽  
Mohamoud Ali ◽  
Ayham Shaer
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Quantum Dot ◽  
Theoretical Study ◽  
Donor Impurity ◽  
Confinement Potential ◽  
Potential Depth ◽  
Diagonalization Method ◽  
Electron Quantum ◽  
Exact Diagonalization Method

We present a theoretical study to investigate the effect of donor impurity on the magnetization (M) and the magnetic susceptibility [Formula: see text] of single electron quantum dot (QD) with Gaussian confinement in the presence of a magnetic field. We solve the Hamiltonian of this system, including the spin, by using the exact diagonalization method. The ground state binding energy (BE) of an electron has been shown as a function of QD radius and confinement potential depth. The behaviors of the magnetization and the magnetic susceptibility of a QD have been studied as a function of temperature, confinement potential depth, quantum radius and magnetic field. We have shown the effect of donor impurity on the magnetization and magnetic susceptibility curves of Gaussian quantum dot (GQD).

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