Double‐drift plasma instabilities in contiguous two‐dimensional electron and hole gases: A solid‐state two‐stream amplifier

1985 ◽  
Vol 57 (10) ◽  
pp. 4772-4777 ◽  
Author(s):  
Frank Crowne
Keyword(s):  
Solid State ◽  
Plasma Instabilities ◽  
Two Dimensional ◽  
Dimensional Electron

Study of interface reactions between Ti/Al/Ni/Au metallization and AlGaN/GaN heterostructures

Open Physics ◽  
2013 ◽  
Vol 11 (2) ◽  
Author(s):  
Wojciech Macherzyński ◽  
Bogdan Paszkiewicz
Keyword(s):  
Solid State ◽  
Structural Changes ◽  
Electron Gas ◽  
Solid State Reactions ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Metallic Contact ◽  
Worst Case ◽  
Dimensional Electron Gas

AbstractThe electrical characteristics, and the range of interface metal-semiconductor reactions of Ti/Al/Ni/Au metallization with AlGaN/GaN heterostructures at various annealing temperatures ranging from 715°C to 865°C, have been investigated. The relation between the depth of the interface solid state reaction and the current-voltage (I-V) characteristics of the ohmic contact, have been studied. It was observed, that the transition from nonlinear to linear I-V behaviour occurred after the annealing at 805°C. The structural changes in AlGaN/GaN heterostructures beneath the metallic contact after the thermal treatment, were investigated. After removing the metallization by etching, the atomic force microscope profiles and scanning electron microscope images, were studied to define the depth to which the interfacial solid state reactions between the metallization and the semiconductor structure take place. It was observed, that the changes in the heterostructures, caused by the interface m-s reactions, were observed up to a depth of 180 nm at 865°C. In the worst case, this could result in the complete removal of the two-dimensional electron gas under the metallization of the ohmic contacts. To study the influence of the annealing process parameters on the properties of the two-dimensional electron gas, the van der Pauw Hall mobility measurement was performed.

scholarly journals Recent Developments in Electron Momentum Spectroscopy of Solids

1998 ◽  
Vol 51 (4) ◽  
pp. 609 ◽  
Author(s):  
Maarten Vos
Keyword(s):  
State Physics ◽  
Solid State ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Solid State Physics ◽  
Future Directions ◽  
Electron Momentum ◽  
Electron Momentum Spectroscopy ◽  
Electron Detection ◽  
Recent Developments

With the advent of two-dimensional electron detection, electron momentum spectroscopy of solids evolved from a spectroscopy in its infancy to a new, viable technique, looking for its place in solid state physics. Here I give an overview of the first sets of experiments, the evolution of the interpretation of these experiments and possible future directions.

Recent results in microwave and rf spectroscopy of two-dimensional electron solids

2005 ◽  
Vol 131 ◽  
pp. 241-246
Author(s):  
R. M. Lewis ◽  
Y. P. Chen ◽  
G. Sambandamurthy ◽  
L. W. Engel ◽  
D. C. Tsui ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Dimensional Electron
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