Browsing by Author "Mikroulis, S."
Now showing items 1-2 of 2
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Article
Effects of the Sapphire Nitridation on the Polarity and Structural Properties of GaN Layers Grown by Plasma-Assisted MBE
Georgakilas, A.; Mikroulis, S.; Cimalla, V.; Zervos, Matthew; Kostopoulos, A.; Komninou, Ph; Kehagias, Th; Karakostas, Th (2001)The nitridation of the (0001) sapphire surface by a nitrogen rf-plasma source used in GaN molecular beam epitaxy has been investigated. Auger electron spectroscopy measurements were used to estimate the extent of the ...
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Article
The Pinch-Off Behaviour and Charge Distribution in AlGaN-GaN-AlGaN-GaN Double Heterostructure Field Effect Transistors
Zervos, Matthew; Kostopoulos, A.; Constantinidis, G.; Kayambaki, M.; Mikroulis, S.; Flytzanis, N.; Georgakilas, A. (2001)AlxGa1-xN/GaN/AlyGa1-yN/GaN double heterojunction field effect transistors with bottom AlyGa1-yN barrier widths between 100 and 2000 Å and Al contents of y = 0.15-0.3 were grown by radio-frequency molecular beam epitaxy ...