Conductance of a disordered double quantum wire in a magnetic field: Boundary roughness scattering

2003 ◽  
Vol 67 (11) ◽  
Author(s):  
S. C. Arapan ◽  
S. V. Korepov ◽  
M. A. Liberman ◽  
B. Johansson
Keyword(s):  
Magnetic Field ◽  
Quantum Wire ◽  
Double Quantum ◽  
Field Boundary ◽  
Boundary Roughness

Effect of the boundary roughness on the conductance of double quantum wire in a magnetic field

2003 ◽  
Vol 64 (2) ◽  
pp. 239-245
Author(s):  
S. C Arapan ◽  
S. V Korepov ◽  
M. A Liberman ◽  
B Johansson
Keyword(s):  
Magnetic Field ◽  
Quantum Wire ◽  
Double Quantum ◽  
Boundary Roughness

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.

Conductance Modulation in Double Quantum Wells Due to Magnetic Field-Induced Anticrossing

1994 ◽  
Vol 73 (16) ◽  
pp. 2256-2259 ◽  
Author(s):  
J. A. Simmons ◽  
S. K. Lyo ◽  
N. E. Harff ◽  
J. F. Klem
Keyword(s):  
Magnetic Field ◽  
Quantum Wells ◽  
Double Quantum ◽  
Conductance Modulation

scholarly journals RESONANT RAMAN SCATTERING OF QUANTUM WIRE IN STRONG MAGNETIC FIELD

1999 ◽  
Vol 13 (17) ◽  
pp. 2275-2283 ◽  
Author(s):  
HYUN C. LEE
Keyword(s):  
Magnetic Field ◽  
Raman Scattering ◽  
Strong Magnetic Field ◽  
Coulomb Interaction ◽  
Quantum Wire ◽  
Spin Excitation ◽  
Momentum Dependence ◽  
Near Resonance ◽  
Resonant Raman ◽  
Resonant Raman Scattering

The resonant Raman scattering of a quantum wire in a strong magnetic field is studied, focused on the effect of long range Coulomb interaction and the spin–charge separation. The energy–momentum dispersions of charge and spin excitation obtained from Raman cross-section show the characteristc cross-over behaviour induced by inter-edge Coulomb interaction. The "SPE" peak near resonance in polarized spectra becomes broad due to the momentum dependence of charge velocity. The broad peak in the depolarized spectra is shown to originate from the disparity between charge and spin excitation velocity.

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