Very Low Electron Density in Undoped Enhancement-Mode Si/SiGe Two-Dimensional Electron Gases with Thin SiGe Cap Layers

2013 ◽  
Vol 53 (3) ◽  
pp. 45-50 ◽  
Author(s):  
C.-T. Huang ◽  
J.-Y. Li ◽  
J. C. Sturm
Keyword(s):  
Electron Density ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases ◽  
Enhancement Mode

scholarly journals Stopping Power Modulation by Pump Waves of Charged Particles Moving above Two-Dimensional Electron Gases

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yahong Yang ◽  
Ya Zhang ◽  
Lin Yi ◽  
Wei Jiang
Keyword(s):  
Electron Density ◽  
Charged Particles ◽  
Stopping Power ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases ◽  
Quantum Electron ◽  
Gain Energy ◽  
Quantum Hydrodynamic ◽  
Pump Waves

The perturbation electron density and stopping power caused by the movement of charged particles above two-dimensional quantum electron gases (2DQEG) have been studied in numerous works using the quantum hydrodynamic (QHD) theory. In this paper, the QHD is modified by introducing the two-dimensional electron exchange-correlation potential at high density V x c 2 DH and the pump wave modulations. Based on the modified QHD, the perturbation electron density and stopping power are calculated for pump waves with various parameters. The results show that the stopping power values are more accurate after considering V x c 2 DH . Under the modulation of pump waves with the wavelength from 0.1 nm to 0.1 cm , the perturbation electron density of 2DQEG and the stopping power of charged particles show periodic changes. Under the modulation of pump waves with λ = 1.76 × 10 − 4 cm and Φ 0 = 2 × 10 10 e / λ f , the average stopping power with respect to the time phase θ becomes negative, which means that the charged particles will gain energy and can be accelerated. This is a new phenomenon in the fields of 2DQEG and of great significance in surface physics and surface modification in nanoelectronic devices with beam matter interactions.

Extremely Low Electron Density in a Modulation-Doped Si/SiGe Two-Dimensional Electron Gases by Effective Schottky Gating

2013 ◽  
Vol 50 (6) ◽  
pp. 145-149 ◽  
Author(s):  
J.-Y. Li ◽  
C.-T. Huang ◽  
L. P. Rokhinson ◽  
J. C. Sturm
Keyword(s):  
Electron Density ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases

Electronic structure of two-dimensional electron gases at differently prepared indium arsenide surfaces

2021 ◽  
Vol 555 ◽  
pp. 149516
Author(s):  
Jacek J. Kolodziej ◽  
Dawid Wutke ◽  
Jakub Lis ◽  
Natalia Olszowska
Keyword(s):  
Electronic Structure ◽  
Indium Arsenide ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases

Temperature studies of the tunnelling between parallel two-dimensional electron gases

1996 ◽  
Vol 40 (1-8) ◽  
pp. 413-415 ◽  
Author(s):  
N Turner ◽  
J.T Nicholls ◽  
E.H Linfield ◽  
K.M Brown ◽  
M Pepper ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases

Interface roughness governed negative magnetoresistances in two-dimensional electron gases in AlGaN/GaN heterostructures

2021 ◽  
Vol 5 (6) ◽  
Author(s):  
Ting-Ting Wang ◽  
Sining Dong ◽  
Zhi-Li Xiao ◽  
Chong Li ◽  
Wen-Cheng Yue ◽  
...  
Keyword(s):  
Interface Roughness ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases

scholarly journals Relevance of weak and strong classical scattering for the giant negative magnetoresistance in two-dimensional electron gases

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
B. Horn-Cosfeld ◽  
J. Schluck ◽  
J. Lammert ◽  
M. Cerchez ◽  
T. Heinzel ◽  
...  
Keyword(s):  
Negative Magnetoresistance ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases
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