Microwave photoresistivity of a two-dimensional electron gas and the fractional quantum Hall effect

1987 ◽  
Vol 36 (2) ◽  
pp. 1266-1268 ◽  
Author(s):  
Y. Guldner ◽  
M. Voos ◽  
J. P. Vieren ◽  
J. P. Hirtz ◽  
M. Heiblum
Keyword(s):  
Quantum Hall Effect ◽  
Electron Gas ◽  
Quantum Hall ◽  
Fractional Quantum Hall Effect ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Dimensional Electron Gas

Enhancements in Two Dimensional Electron Gas Density and Mobility in δ-Doped AiGaAs Heterostructures

1987 ◽  
Vol 102 ◽  
Author(s):  
J. E. Cunningham ◽  
G. L Timp ◽  
E. F. Schubert ◽  
W. T. Tsang ◽  
P. G. N. DeVegvar ◽  
...  
Keyword(s):  
Quantum Hall Effect ◽  
Electron Gas ◽  
Quantum Hall ◽  
Fractional Quantum Hall Effect ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Dimensional Electron Gas ◽  
B Doping

ABSTRACTWe report our recent investigations of a new structure formed by b-doping the barrier of an AlGaAs/GaAs heterostructure. In this new structure we have observed both a mobility of 1.9×lO6cm2/Vsec and the fractional quantum hall effect. We compare low temperature mobilities and densities achieved with the δ-doped heterostructure with corresponding high values reported in the literature for the homogeneously- doped heterostructure. We show that systematic enhancements in both density and mobility occur in the b-doped heterostructure. By δ-doping both barriers of a quantum well we have also achieved electron concentrations of 4×1012cm -2 in the well.

scholarly journals 3/2 fractional quantum Hall plateau in confined two-dimensional electron gas

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Hailong Fu ◽  
Yijia Wu ◽  
Ruoxi Zhang ◽  
Jian Sun ◽  
Pujia Shan ◽  
...  
Keyword(s):  
Electron Gas ◽  
Quantum Hall ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Fractional Quantum ◽  
Edge Structure ◽  
Fractional Quantum Hall ◽  
Lateral Confinement ◽  
Dimensional Electron Gas

Abstract Even-denominator fractional quantum Hall (FQH) states, such as 5/2 and 7/2, have been well known in a two-dimensional electron gas (2DEG) for decades and are still investigated as candidates of non-Abelian statistics. In this paper, we present the observation of a 3/2 FQH plateau in a single-layer 2DEG with lateral confinement at a bulk filling factor of 5/3. The 3/2 FQH plateau is quantized at $$\left( {\frac{h}{{e^2}}} \right)/\left( {\frac{3}{2}} \right)$$ h e 2 ∕ 3 2 within 0.02%, and can survive up to 300 mK. This even-denominator FQH plateau may imply intriguing edge structure and excitation in FQH system with lateral confinement. The observations in this work demonstrate that understanding the effect of the lateral confinement on the many-body system is critical in the pursuit of important theoretical proposals involving edge physics, such as the demonstration of non-Abelian statistics and the realization of braiding for fault-tolerant quantum computation.

Spectroscopy of a two-dimensional electron gas in the quantum-Hall-effect regime by use of low-frequency edge magnetoplasmons

1992 ◽  
Vol 46 (19) ◽  
pp. 12427-12432 ◽  
Author(s):  
V. I. Talyanskii ◽  
A. V. Polisski ◽  
D. D. Arnone ◽  
M. Pepper ◽  
C. G. Smith ◽  
...  
Keyword(s):  
Hall Effect ◽  
Quantum Hall Effect ◽  
Electron Gas ◽  
Quantum Hall ◽  
Low Frequency ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas
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