Hot-electron transport in AlGaN/GaN two-dimensional conducting channels

Danilchenko, B. A.; Zelensky, S. E.; Drok, E.; Vitusevich, S. A.; Danylyuk, S. V.; Klein, N.; Lüth, H.; Belyaev, A. E.; Kochelap, V. A.
November 2004
Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5421
Academic Journal
We report on experimental studies of high-field electron transport in AlGaN/GaN two-dimensional electron gas. The velocity–electric field characteristics are extracted from 10 to 30 ns pulsed current–voltage measurements for 4.2 and 300 K. An electron drift velocity as high as 1.7×107 cm/s was obtained in the fields 150 kV/cm. Estimates of thermal budget of the system show that overheating of the electrons exceeds 1700 K at highest electric fields achieved in the experiment.


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