Ground state and collective excitations of quantum dots: Correlation effects and Hund’s rule in magnetic field

2007 ◽  
pp. 111-120
Author(s):  
O. Steffens ◽  
M. Suhrke ◽  
U. Rössler
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Ground State ◽  
Collective Excitations ◽  
Correlation Effects ◽  
Hund’S Rule ◽  
Hund's Rule

scholarly journals Спиновая динамика отрицательно заряженных экситонов в квантовых точках InP/(In,Ga)P в магнитном поле

2020 ◽  
Vol 62 (11) ◽  
pp. 1816
Author(s):  
С.В. Некрасов ◽  
Ю.Г. Кусраев ◽  
И.А. Акимов ◽  
L. Langer ◽  
M. Kotur ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Circular Polarization ◽  
Ground State ◽  
Heavy Hole ◽  
Spin Dynamics ◽  
Nuclear Spins ◽  
Time Resolved ◽  
Exciton Ground State ◽  
Charged Exciton

The dynamics of the photoluminescence negative circular polarization of the InP/(In,Ga)P quantum dots ensemble was studied. We find that in the time-resolved dependences of the polarization there are no oscillations in Voigt magnetic field. Also, with increasing field the polarization declines to zero. Such behavior is attributed to the peculiarities of the negatively charged exciton spin dynamics, particularly, to the fact that in the negatively charged exciton ground state the spin dynamics is governed by the heavy hole. We show that magnetic field depolarization of the photoluminescence occurs once the field of dynamically polarized nuclear spins acting on electron spins is surpassed.

COLLECTIVE EXCITATIONS IN SEMICONDUCTOR AND GRAPHENE BILAYERS IN HIGH MAGNETIC FIELD

2009 ◽  
Vol 23 (12n13) ◽  
pp. 2851-2855
Author(s):  
VERONIKA BISTI
Keyword(s):  
Magnetic Field ◽  
Charge Density ◽  
Ground State ◽  
Asymmetry Parameter ◽  
Filling Factor ◽  
Electron System ◽  
Collective Excitations ◽  
Graphene Layers ◽  
Space Symmetry ◽  
The Difference

The effect of space symmetry on magnetoplasmon charge density and spin-density excitations in a weakly tunnel coupled bilayer electron system at the filling factor ν = 4 is considered. The optic magnetoplasmon energy as well as the energy of intralayer magnetoexciton is not affected by space symmetry. Three other collective magnetoplasmon modes as well as three magnetoexciton modes are determined by relations between the asymmetry parameter, tunnel parameter, and the difference in energies of intralayer and interlayer magnetoexcitons. The charge-density excitations in bilayer graphene at the filling-factor ν ≪ 1 are considered. The presence of small asymmetry of graphene layers is taken into account. It is demonstarted that the magnetoplasmon energy depends on the bilayer ground state.

Effects of Confinement on Shallow Impurities in GaAs-Ga 1−xA1xAs Quantum Dots

1992 ◽  
Vol 281 ◽  
Author(s):  
Francisco A. P. Osörio ◽  
Oscar HipöLito ◽  
Francois M. Peeters
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Quantum Dot ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Perpendicular Magnetic Field ◽  
Confinement Potential ◽  
Shallow Impurity ◽  
Shallow Impurities

ABSTRACTThe ground state energy of a shallow impurity placed in the center of a circular quantum dot is studied. The effects of the strength of the confinement potential and a perpendicular magnetic field are investigated theoretically.

Pair-tunneling states in semiconductor quantum dots: Ground-state behavior in a magnetic field

1998 ◽  
Vol 57 (19) ◽  
pp. 12281-12284 ◽  
Author(s):  
Ernestine Lee ◽  
Aaron Puzder ◽  
M. Y. Chou ◽  
T. Uzer ◽  
David Farrelly
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Ground State ◽  
Semiconductor Quantum Dots ◽  
State Behavior ◽  
Pair Tunneling
Sign in / Sign up

Export Citation Format

Share Document