Magic Numbers and Ground-State Transitions of Coupled Quantum Dots

1999 ◽  
Vol 32 (4) ◽  
pp. 545-548
Author(s):  
Xie WenFang ◽  
Chen ChuanYu
Keyword(s):  
Quantum Dots ◽  
Ground State ◽  
State Transitions ◽  
Magic Numbers ◽  
Coupled Quantum Dots

FOUR-ELECTRON SYSTEMS CONFINED IN MULTILAYER QUANTUM DOTS

2007 ◽  
Vol 21 (21) ◽  
pp. 1399-1413 ◽  
Author(s):  
WENFANG XIE
Keyword(s):  
Quantum Dots ◽  
Angular Momentum ◽  
Ground State ◽  
Electronic Structures ◽  
Electron Interaction ◽  
Magic Numbers ◽  
Electron Systems ◽  
Diagonalization Method ◽  
Exact Diagonalization Method ◽  
Ground State Electron

In this paper, we studied four-electron systems confined in one-, two-, and four-layer quantum dots, by the exact diagonalization method. A vertical magnetic field to the confinement plane is considered. The ground-state electronic structures and the spin and angular momentum transitions for different magnetic fields are investigated. Series of magic numbers of angular momentum which minimize the ground-state electron–electron interaction energy have been discovered. These are connected to the exchange and rotational symmetries of the systems.

Magic numbers in vertically coupled quantum dots

1998 ◽  
Vol 3 (3) ◽  
pp. 407-411 ◽  
Author(s):  
W.-Y. Ruan ◽  
H.-F. Cheung
Keyword(s):  
Quantum Dots ◽  
Magic Numbers ◽  
Coupled Quantum Dots

scholarly journals Спектроскопия возбуждения фотолюминесценции массивов квантовых точек InAs/InGaAs/GaAs в температурном диапазоне 20-300 K

2020 ◽  
Vol 128 (1) ◽  
pp. 110
Author(s):  
Д.А. Рыбалко ◽  
А.М. Надточий ◽  
М.В. Максимов ◽  
А.Е. Жуков
Keyword(s):  
Quantum Dots ◽  
Excited States ◽  
Ground State ◽  
Carrier Transport ◽  
State Energy ◽  
Energy Difference ◽  
State Transitions ◽  
Photoluminescence Excitation ◽  
Spectra Analysis ◽  
Detection Energy

Detailed photoluminescence and photoluminescence excitation (PLE) studying in temperature range 20-300 K with variation of detection energy of selforganized InAs/InGaAs/GaAs quantum dots is presented in this work. PLE spectra analysis allowed us to identify two types of peaks. First type associated with excited-ground state transitions with high probability. Second corresponds to transitions from excited states to the ground state which probability is small, but significantly increased due to the effective relaxation of carriers with LO phonons. We discovered, that the QD distinctive dependence of the energy difference between peaks spectral positions corresponding to the ground and excited states on the ground state energy (i.e., on the quantum dots size) deviates as the temperature rises to 140–160 K, at which charge carrier transport between QD is activated.

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