Fabrication and characterization of Al/sub x/Ga/sub 1-x/N/GaN heterostructures with high mobility of two-dimensional electron gas

2005 ◽  
Author(s):  
B. Shen ◽  
Y.G. Zhou ◽  
Z.W. Zheng ◽  
J. Liu ◽  
H.M. Zhou ◽  
...  
Keyword(s):  
Electron Gas ◽  
High Mobility ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Fabrication And Characterization ◽  
Dimensional Electron Gas

Investigation of Traps in AlGaN/GaN Heterostructures by Ultrasonic Vibrations

2021 ◽  
Vol 66 (12) ◽  
pp. 1058
Author(s):  
V.V. Kaliuzhnyi ◽  
O.I. Liubchenko ◽  
M.D. Tymochko ◽  
Y.M. Olikh ◽  
V.P. Kladko ◽  
...  
Keyword(s):  
Carrier Density ◽  
Electron Gas ◽  
Two Dimensional ◽  
Ultrasonic Vibrations ◽  
Persistent Photoconductivity ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dx Centers ◽  
Dimensional Electron Gas

A method of dynamic deformations has been proposed as a useful informative tool in the characterization of transportation properties of a two-dimensional electron gas (2DEG) in AlGaN/GaN heterostructures. It is found that the exposing of a sample to ultrasonic vibrations results in the persistent acousto-conductivity (PAC) which was observed up to room temperatures. The PAC behaves itself like persistent photoconductivity (PPC), and the carrier density in the 2DEG channel is primarily contributed by the transfer of electrons excited from traps (like DX centers) as a result of their reconstruction under the ultrasonic loading.

RESPONSE OF A 2DEG TO MICROWAVE IRRADIATION

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1579-1583 ◽  
Author(s):  
S. Moreau ◽  
O. M. Fedorych ◽  
M. L. Sadowski ◽  
M. Potemski ◽  
S. Studenikin ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Electron Gas ◽  
High Mobility ◽  
Light Illumination ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Visible Light Illumination ◽  
Dimensional Electron Gas ◽  
Absorption Measurements

In this paper, we study the behavior of a high mobility two dimensional electron gas under microwave irradiation by means of magneto-photoluminescence (PL) and absorption measurements. The high mobility sample investigated is a 15nm wide GaAs/AlGaAs quantum well with an electron concentration between 1-2×1011 cm -2, tunable by visible-light illumination. Structures in the microwave absorption at 40-60GHz are identified as geometrically confined magneto-plasmons.

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