Observation of two-dimensional hole gas with mobility and carrier density exceeding those of two-dimensional electron gas at room temperature in the SiGe heterostructures

2007 ◽  
Vol 91 (8) ◽  
pp. 082108 ◽  
Author(s):  
M. Myronov ◽  
K. Sawano ◽  
Y. Shiraki ◽  
T. Mouri ◽  
K. M. Itoh
Keyword(s):  
Carrier Density ◽  
Room Temperature ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
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.

Ion Damage Studies in GaAs-Algaas Ultra-Narrow Wires

1988 ◽  
Vol 144 ◽  
Author(s):  
T. L. Cheeks ◽  
M. L. Roukes ◽  
A. Scherer ◽  
B. P. Van Der Gaag ◽  
H. G. Craighead
Keyword(s):  
Carrier Density ◽  
Electron Gas ◽  
Low Energy ◽  
Charge Carrier Density ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electrical Measurements ◽  
Two Dimensional Electron Gas ◽  
Ion Damage ◽  
Dimensional Electron Gas

ABSTRACTLow energy ion damage effects have been investigated in GaAs-A1GaAs two dimensional electron gas (2DEG) materials. The effect of ion mass (He, Ar, Xe) and adsorbed C12 on the charge carrier density and mobility has been studied for ion bombarded 2DEG systems. The 2DEG mobility was significantly reduced by ion damage with the effect becoming more dramatic with smaller ion mass. For the same treatment, the two dimensional carrier density was relatively unaffected. The results of He ion exposure showed serious degradation of the 2DEG with moderate ion dose. Electrical measurements were performed to determine the conducting widths of narrow patterned wires. For the same structural widths (mask width) He defined wires showed smaller electrical widths than Ar milling in the presence of chlorine. Serious limitations to patterning small structures may be imposed using beam processes that include He or other light mass species.

Edge current switch of two-dimensional electron gas using carrier density control

2004 ◽  
Vol 130 (6) ◽  
pp. 391-395 ◽  
Author(s):  
Yongho Seo ◽  
Byeongho Eom ◽  
Insuk Yu ◽  
Kyoungwan Park ◽  
Seongjae Lee
Keyword(s):  
Carrier Density ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Current Switch ◽  
Density Control ◽  
Edge Current ◽  
Dimensional Electron Gas
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