Effect of interdiffusion and magnetic field on two-electron states in Gaussian-shaped double quantum rings

2017 ◽  
Vol 88 ◽  
pp. 157-163 ◽  
Author(s):  
V.L. Aziz-Aghchegala ◽  
V.N. Mughnetsyan ◽  
A.A. Kirakosyan
Keyword(s):  
Magnetic Field ◽  
Double Quantum ◽  
Electron States ◽  
Quantum Rings

Magnetic-field-induced electron transitions in concentric double quantum rings

2010 ◽  
Vol 7 (11-12) ◽  
pp. 2608-2611 ◽  
Author(s):  
José Maria Escartin ◽  
Francesc Malet ◽  
Marti Pi ◽  
Manuel Barranco
Keyword(s):  
Magnetic Field ◽  
Double Quantum ◽  
Quantum Rings ◽  
Electron Transitions

Hydrostatic pressure effects on electron states in GaAs–(Ga,Al)As double quantum rings

2009 ◽  
Vol 105 (9) ◽  
pp. 094324 ◽  
Author(s):  
F. J. Culchac ◽  
N. Porras-Montenegro ◽  
A. Latgé
Keyword(s):  
Hydrostatic Pressure ◽  
Pressure Effects ◽  
Double Quantum ◽  
Electron States ◽  
Quantum Rings

scholarly journals Vertically coupled double quantum rings at zero magnetic field

2006 ◽  
Vol 73 (24) ◽  
Author(s):  
F. Malet ◽  
M. Barranco ◽  
E. Lipparini ◽  
R. Mayol ◽  
M. Pi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Zero Magnetic Field ◽  
Double Quantum ◽  
Quantum Rings

SPECTRUM OF CARRIERS AND OPTICAL PROPERTIES OF 2D HETEROSTRUCTURES IN TILTED MAGNETIC FIELD

2003 ◽  
Vol 02 (06) ◽  
pp. 401-409
Author(s):  
A. A. GRESHNOV ◽  
E. N. KOLESNIKOVA ◽  
G. G. ZEGRYA
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Quantum Wells ◽  
Cyclotron Resonance ◽  
Double Quantum ◽  
Electron States ◽  
Double Quantum Well ◽  
Magnetic Length ◽  
Broken Gap ◽  
Tilted Magnetic Field

The structure and features of spatially-confined states in the presence of a tilted magnetic field are theoretically investigated. The electron states in single- and double-quantum wells are described using the variational method. It is shown that the finite ratio of magnetic length to the width of heterostructure could not be neglected in the strong tilted magnetic field. The electronic structure of broken-gap heterostructures is considered similar to the case of usual double-quantum-well with the high narrow barrier. It is shown that tilted magnetic field can eliminate the strong coupling between two degenerated electron states or those of the electron and hole. The existence of such an effect is in accordance with cyclotron resonance studies of InAs / GaSb heterostructures.

Coupling in concentric double quantum rings

2007 ◽  
Vol 91 (13) ◽  
pp. 133116 ◽  
Author(s):  
A. Mühle ◽  
W. Wegscheider ◽  
R. J. Haug
Keyword(s):  
Double Quantum ◽  
Quantum Rings

scholarly journals TRANSPORT PROPERTIES OF 2D ELECTRON GAS IN AN n-InGaAs/GaAs DQW IN A VICINITY OF LOW MAGNETIC-FIELD-INDUCED HALL INSULATOR–QUANTUM HALL LIQUID TRANSITION

2007 ◽  
Vol 06 (03n04) ◽  
pp. 173-177
Author(s):  
YU. G. ARAPOV ◽  
S. V. GUDINA ◽  
G. I. HARUS ◽  
V. N. NEVEROV ◽  
N. G. SHELUSHININA ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Gas ◽  
Quantum Hall ◽  
Zero Magnetic Field ◽  
Double Quantum ◽  
Ballistic Regime ◽  
2D Electron Gas ◽  
Double Quantum Well ◽  
Liquid Transition ◽  
Low Magnetic Field

The resistivity (ρ) of low mobility dilute 2D electron gas in an n- InGaAs / GaAs double quantum well (DQW) exhibits the monotonic "insulating-like" temperature dependence (dρ/dT < 0) at T = 1.8–70 K in zero magnetic field. This temperature interval corresponds to a ballistic regime (kBTτ/ħ > 0.1–3.5) for our samples, and the electron density is on an "insulating" side of the so-called B = 0 2D metal–insulator transition. We show that the observed features of localization and Landau quantization in a vicinity of the low magnetic-field-induced insulator–quantum Hall liquid transition is due to the σxy(T) anomalous T-dependence.

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