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Abstract
Experimental results are presented showing the variation of the peak velocity, electric field at peak velocity and saturated velocity of the velocity-field curve for bulk n-GaAs under hydrostatic pressure. Similar data are presented for the field at peak velocity for bulk n-InP. The extraction of the data from the current-voltage characteristics is based on an exploitation of the influence of boundary conditions on the manifestation of transferred-electron induced (Gunn) current instabilities. Our results, which differ from those of other investigations, are compared with our Monte Carlo calculations of the velocity-field curves for these materials. We find that ionized impurity scattering plays an important role in the understanding of our data.
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