Determination of the limiting mobility of a two-dimensional electron gas inAlxGa1−xAs/GaAsheterostructures and direct measurement of the energy relaxation time

1996 ◽  
Vol 53 (12) ◽  
pp. R7592-R7595 ◽  
Author(s):  
A. A. Verevkin ◽  
N. G. Ptitsina ◽  
G. M. Chulcova ◽  
G. N. Gol'tsman ◽  
E. M. Gershenzon ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Direct Measurement ◽  
Electron Gas ◽  
Energy Relaxation ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Energy Relaxation Time ◽  
Dimensional Electron Gas

ESTIMATION OF ELECTRON ENERGY RELAXATION TIME IN 2DEG CHANNELS FROM TRANSVERSE AND LONGITUDINAL NOISE

2002 ◽  
Vol 02 (01) ◽  
pp. L53-L63 ◽  
Author(s):  
L. ARDARAVICIUS ◽  
J. LIBERIS ◽  
A. MATULIONIS ◽  
M. RAMONAS
Keyword(s):  
Relaxation Time ◽  
Electric Field ◽  
Electron Gas ◽  
Noise Temperature ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Energy Relaxation Time ◽  
Dimensional Electron Gas ◽  
Microwave Noise

Microwave noise is investigated in heterostructures subjected to an electric field applied parallel to the interfaces. The longitudinal and transverse noise temperatures are measured and simulated in the plane of electron confinement in the directions perpendicular and parallel to the electric field. Monte Carlo simulation is performed for a subcritically doped InAlAs/InGaAs/InAlAs heterostructure containing a two-dimensional electron gas in a single channel. The simulated longitudinal noise temperature is found to be nearly the same as the transverse one in the field range where the interwell transfer of hot electrons is not important. The longitudinal noise temperature exceeds the transverse one considerably in a supercritically doped InAlAs/InGaAs/InAlAs/InP heterostructure containing three separate quantum-well channels, each accommodating a two-dimensional electron gas at equilibrium. The observed strong planar anisotropy is ascribed to the channel occupancy fluctuations caused by the interwell transfer of equilibrium electrons. A possibility to estimate energy relaxation time from the transverse and the longitudinal microwave noise measurements is discussed.

scholarly journals Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas

2013 ◽  
Vol 8 (1) ◽  
pp. 138 ◽  
Author(s):  
Tsai-Yu Huang ◽  
Chi-Te Liang ◽  
Yang Fang Chen ◽  
Michelle Y Simmons ◽  
Gil-Ho Kim ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas
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