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(Color online) Distributions of (a) electric field and (b) drift velocity in a GaN diode at different values of : curve 1, 1.0; curve 2, 1.5; curve 3, 2.1; and curve 4, 2.5. The dash-dotted line indicates the threshold field .
Current-voltage characteristics of a GaN nanoscale diode. The data point on the curve (marked by triangles) shows the values of and considered in Fig. 1.
(Color online) Normalized real part of small-signal impedance of a GaN diode as a function of frequency for different values of : curve 1, 1.0; curve 2, 1.5; curve 3, 2.1; and curve 4, 2.5. The inset provides a magnified view of the frequency window with negative values (curve 4).
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