Ring interferometer on the basis of 2D electron gas in a double quantum well

JETP Letters ◽  
2003 ◽  
Vol 78 (9) ◽  
pp. 560-563
Author(s):  
A. A. Bykov ◽  
D. V. Nomokonov ◽  
A. K. Bakarov ◽  
A. I. Toropov ◽  
O. Estibals ◽  
...  
Keyword(s):  
Quantum Well ◽  
Electron Gas ◽  
Double Quantum ◽  
2D Electron Gas ◽  
Ring Interferometer ◽  
Double Quantum Well

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.

Small ring interferometer on the basis of a GaAs quantum well with a high density 2D electron gas

2002 ◽  
Vol 12 (1-4) ◽  
pp. 778-781 ◽  
Author(s):  
A.A. Bykov ◽  
O. Estibals ◽  
I.V. Marchishin ◽  
L.V. Litvin ◽  
A.K. Bakarov ◽  
...  
Keyword(s):  
Quantum Well ◽  
Electron Gas ◽  
High Density ◽  
Small Ring ◽  
2D Electron Gas ◽  
Ring Interferometer
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