Amplification and directional emission of surface acoustic waves by a two-dimensional electron gas

2015 ◽  
Vol 106 (2) ◽  
pp. 023106 ◽  
Author(s):  
Lei Shao ◽  
Kevin P. Pipe
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Directional Emission ◽  
Dimensional Electron Gas

scholarly journals Interaction of surface acoustic waves with a two-dimensional electron gas in the presence of spin splitting of the Landau bands

1999 ◽  
Vol 33 (8) ◽  
pp. 892-897 ◽  
Author(s):  
I. L. Drichko ◽  
A. M. D’yakonov ◽  
I. Yu. Smirnov ◽  
V. V. Preobrazhenskii ◽  
A. I. Toropov
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Electron Gas ◽  
Spin Splitting ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas

Characterization of a two-dimensional electron gas in GaAs–AlGaAs by surface acoustic waves

1991 ◽  
Vol 69 (3-4) ◽  
pp. 461-464 ◽  
Author(s):  
F. Guillion ◽  
A. Sachrajda ◽  
M. D'Iorio ◽  
R. Boulet ◽  
P. Coleridge
Keyword(s):  
Acoustic Waves ◽  
Carrier Density ◽  
Wave Attenuation ◽  
Surface Acoustic Waves ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas

We report simultaneous magnetotransport and surface acoustic-wave attenuation measurements performed at 1.25 K on a two-dimensional electron gas (2-DEG) GaAs–AlGaAs heterojunction sample. The carrier density was varied by means of the persistent photoconductivity effect. A comparison of the conductivity deduced from the two types of measurements is used to obtain information about the homogeneity of the 2-DEG sample. For this specific sample a simple model shows that there exists a 20% variation in the carrier density at some intermediate carrier densities, while prior to illumination and after saturation with light the spread in carrier density in the sample was only a few percent.

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