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(a) dependence of the curves at and . For clarity, the curves are displaced along the vertical axis and normalized to the maximum in . The asterisks indicate the threshold voltages for NDC and for current instability . Bottom inset: schematic of the Ga(AsN) diode. (b) dependence of the measured (full dots) and calculated (lines) positions of the critical electric field for NDC. (c) dependence of the measured (full dots) and calculated (line) positions of the threshold electric field for current instability. The continuous lines in parts (b) and (c) correspond to the calculated values of and for (b) , 0.2 and and (c) .
(a) Calculated dependence of the normalized drift velocity on for different values of . Inset: and curves used in this model. (b) Calculated dependence of on for different values of . The shadowed area indicates the bias region of current instability in .
(Color online) (a) Electron trajectories in momentum, (b) velocity, and (c) real space for different values of . The dots in part (c) indicate the points in real space at which the electron comes to rest.
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