Polaronic effects on the energy levels of a double donor impurity in quantum wells in the presence of a magnetic field

1999 ◽  
Vol 12 (3) ◽  
pp. 347-350 ◽  
Author(s):  
Zi-xin Liu ◽  
Zhen-jiang Lai ◽  
Yong-chang Huang ◽  
Ya Liu ◽  
Guo-jun Cheng
Keyword(s):  
Magnetic Field ◽  
Quantum Wells ◽  
Energy Levels ◽  
Donor Impurity

Magnetic Field Effects on Electron Eigenstates in a Concentric Triple Quantum Ring

2010 ◽  
Vol 10 ◽  
pp. 121-130 ◽  
Author(s):  
Hojjatollah K. Salehani ◽  
Mahdi Esmaeilzadeh ◽  
Khosrow Shakouri
Keyword(s):  
Magnetic Field ◽  
Energy Levels ◽  
Quantum Ring ◽  
Dimensional System ◽  
Magnetic Field Effects ◽  
Donor Impurity ◽  
Quantum Rings ◽  
Hydrogenic Donor Impurity ◽  
Hydrogenic Donor ◽  
The Magnetic Field

In this paper, the electronic eigenstates and energy spectra of a two-dimensional system formed by three concentric, coupled, semiconductor quantum rings with a perpendicular magnetic field in the presence and the absence of a single ionized hydrogenic donor impurity are studied. It is found that the magnetic field localizes the electron wave function in the inner rings. The effects of hydrogenic donor on the electronic structure of concentric triple quantum rings are investigated in the both on- and off-center configurations. It is shown that as the donor moves away from the center of the system, the ground state energy decreases monotonically, the degeneracy is lifted and the gap between the energy levels increases. Also, the binding energy of donor impurity increases with increasing magnetic field.

Magnetooptical Studies of Acceptors Confined in GaAs/AIGaAs Quantum Wells

1993 ◽  
Vol 325 ◽  
Author(s):  
P.O. Holtz ◽  
Q.X. Zhao ◽  
B. Monemar ◽  
A. Pasquarello ◽  
M. Sundaram ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Wells ◽  
Ground State ◽  
Energy Levels ◽  
Zeeman Splitting ◽  
Growth Direction ◽  
Bulk Gaas ◽  
Theoretical Predictions ◽  
Resonant Raman ◽  
The Magnetic Field

AbstractMagnetooptical studies have been performed on the shallow Be acceptor confined in the central region of narrow GaAs/AlGaAs quantum wells (QWs) with the magnetic field along the growth direction. The magnetic field dependence of the acceptor transition between the 1S(Г6) hh-like ground state and the excited hh-like 2S(Г6) state has been investigated by means of two independent techniques: Two-hole transitions of the acceptor bound exciton (BE) and resonant Raman scattering. The 1S(Г6) – 2S(Г6) transition energy as a function of the magnetic field has been measured for central acceptors in QWs of widths in the range 50 – 150 Å. The energy levels for the 1S ground states and 2S excited states of the confined acceptor with a magnetic field as a perturbation have also been calculated. These calculations predict a larger splitting between the mj=+3/2 and mj=−3/2 components of the acceptor 1S(Г6) ground state in comparison with the corresponding splitting of the excited 2S(Г6) state. The experimental results are in good agreement with the theoretical predictions derived without any fitting parameters. Furthermore, the Zeeman splitting of the acceptor BE emission has been measured and it is concluded that the J = 5/2 BE state is lowest in energy, similar to shallow acceptor BEs in bulk GaAs.

TEMPERATURE AND MAGNETIC FIELD INDUCED BANDSTRUCTURE REVERSAL IN GaSb/AlSb QUANTUM WELLS

1987 ◽  
Vol 48 (C5) ◽  
pp. C5-159-C5-162
Author(s):  
A. FORCHEL ◽  
U. CEBULLA ◽  
G. TRÄNKLE ◽  
W. OSSAU ◽  
G. GRIFFITHS ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Wells

scholarly journals NONCOMMUTATIVE GRAPHENE

2013 ◽  
Vol 28 (16) ◽  
pp. 1350064 ◽  
Author(s):  
CATARINA BASTOS ◽  
ORFEU BERTOLAMI ◽  
NUNO COSTA DIAS ◽  
JOÃO NUNO PRATA
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Dirac Equation ◽  
Energy Levels ◽  
Dirac Fermions ◽  
Two Dimensional ◽  
Dirac System ◽  
Noncommutative Parameter

We consider a noncommutative description of graphene. This description consists of a Dirac equation for massless Dirac fermions plus noncommutative corrections, which are treated in the presence of an external magnetic field. We argue that, being a two-dimensional Dirac system, graphene is particularly interesting to test noncommutativity. We find that momentum noncommutativity affects the energy levels of graphene and we obtain a bound for the momentum noncommutative parameter.

Thermoelectric Power in Quantum Confined Bismuth Under Classically Large Magnetic Field

1990 ◽  
Vol 216 ◽  
Author(s):  
Kamakhya P. Ghatak ◽  
S. N. Biswas
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Quantum Well ◽  
Film Thickness ◽  
Quantum Wells ◽  
Thermoelectric Power ◽  
Large Magnetic Field ◽  
Quantum Well Wires ◽  
Electron Dispersion ◽  
Theoretical Results

ABSTRACTIn this paper we studied the thermoelectric power under classically large magnetic field (TPM) in quantum wells (QWs), quantum well wires (QWWS) and quantum dots (QDs) of Bi by formulating the respective electron dispersion laws. The TPM increases with increasing film thickness in an oscillatory manner in all the cases. The TPM in QD is greatest and the least for quantum wells respectively. The theoretical results are in agreement with the experimental observations as reported elsewhere.

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