Energy spectra of two electrons in a harmonic quantum dot

1991 ◽  
Vol 43 (9) ◽  
pp. 7320-7323 ◽  
Author(s):  
U. Merkt ◽  
J. Huser ◽  
M. Wagner
Keyword(s):  
Quantum Dot ◽  
Energy Spectra

Effects of impurity on the energy spectra of quantum-dot lithium

2016 ◽  
Vol 481 ◽  
pp. 179-184 ◽  
Author(s):  
Z.D. Vatansever ◽  
S. Sakiroglu ◽  
K. Akgungor ◽  
I. Sokmen
Keyword(s):  
Quantum Dot ◽  
Energy Spectra

Energy Spectra of the Low-Lying State in N-Layer Quantum Dots

2013 ◽  
Vol 483 ◽  
pp. 170-173
Author(s):  
An Mei Wang
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Angular Momentum ◽  
External Magnetic Field ◽  
Quantum Dot ◽  
Applied Magnetic Field ◽  
Ground State ◽  
Weak Coupling ◽  
State Energy ◽  
Energy Spectra

A method is proposed to exactly diagonalize the Hamiltonian of a N-layer quantum dot containing a single electron in each dot in arbitrary magnetic fields. the energy spectra of the dot are calculated as a function of the applied magnetic field. We find disco-ntinuous ground-state energy transitions induced by an external magnetic field in the case of strong coupling. However, in the case of weak coupling, such a transition does not occur and the angular momentum remains zero.

scholarly journals Influence of quantum dot shape on energy spectra of three-dimensional quantum dots superlattices

2020 ◽  
Vol 21 (4) ◽  
pp. 584-590
Author(s):  
I.V. Bilynskyi ◽  
R.Ya. Leshko ◽  
H.O. Bandura
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Three Dimensional ◽  
Energy Spectra ◽  
Band Spectrum ◽  
High Symmetry ◽  
Different Shapes

The band spectrum of quantum dots superlattices of different shapes at points of high symmetry is determined. Cubic, cylindrical and spherical quantum dots are considered. The width of the minizone is calculated. The dependences of the minizones on the geometric dimensions of quantum dots and their concentration are established.

scholarly journals Miniband Electroconductivity in Superlattices of Cubic Quantum Dots of the InAs/GaxIn1-xAs Heterosystem

2017 ◽  
Vol 18 (1) ◽  
pp. 94-101 ◽  
Author(s):  
V.I. Boichuk ◽  
I.V. Bilynskyi ◽  
R.I. Pazyuk
Keyword(s):  
Relaxation Time ◽  
Quantum Dot ◽  
Charge Carriers ◽  
Energy Spectra ◽  
Mass Approximation ◽  
Electron Relaxation ◽  
Impurity System ◽  
Electron Relaxation Time ◽  
Concentration Of Impurities ◽  
Numerical Index

In this paper, the model of InAs/GaxIn1-xAs cubic quantum dot superlattices (CQDS) of various dimensionality has been proposed. The energy spectra of electrons and holes of the quantum dot superlattice have been determined in the effective mass approximation and modified Kronig-Penney model. In the frame of this model, the spectra of charges of 3D, 2D and 1D-superlattices can be obtained by changing respective distances between the elements of the superlattice. The energy dependence of the electron and hole subbands (under-the-barrier subbands and over-the-barrier subbands) on the wave vector of the superlattice has been calculated. The number of under-the-barrier subbands is determined by QD size and width of each subband is defined by QD size, distances between superlattice elements and subband numerical index. The dependences of the Fermi energy and concentration of charge carriers on temperature, concentration of impurities, energy of impurity levels have been obtained and analyzed. We have taken account of the dependence of electron relaxation time on temperature caused by scattering of carriers on both phonons and donor centers. The effect of the impurity system on electroconductivity of the CQDS is investigated. 

Effect of a Charged Impurity on a Lithium Quantum Dot

2003 ◽  
Vol 17 (18) ◽  
pp. 973-981 ◽  
Author(s):  
Yi-Min Liu ◽  
Gang-Ming Huang
Keyword(s):  
Spatial Distribution ◽  
Quantum Dot ◽  
Ground States ◽  
Energy Spectra ◽  
Charged Impurity ◽  
Electronic Configurations

A lithium quantum dot (QD) with a charged impurity is studied, where the charged impurity is located on the z-axis at a distance d from the lithium QD plane (the x–y plane). Using the method of few-body physics, the energy spectra of the low-lying states of the QD are obtained as a function of d. It is found that the energy spectra depend strongly on both the position and charge of the impurity. Furthermore, the impurity affects the electronic configurations of the QD, i.e. the spatial distribution of the electrons of the QD. Our calculations indicate that the change of d induces transitions in the ground states of the QD, which can be explained by dynamics and symmetry.

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