Problem of generation of current oscillations in bismuth
Yu. A. BogodPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRР. Г. ВалеевPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRG. P. OnokienkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Abstract
It is shown that the frequency of the damped current oscillations in bismuth at 20.4°K discovered previously by Bogod, Valeev, and Onokienko is determined by the dimension of the sample d in the direction [E × H]. With a given value of the current passing through the sample, and with other conditions being equal, the amplitude of the oscillations depends on the shape of the input signal, and the attenuation is determined, to a considerable degree, by its derivative with respect to time. A nonmonotonic dependence is observed for the amplitude of the oscillations on the rate of change of the input signal when it is increased. At 20.4°K, undamped oscillations are observed with a frequency of ≈4(s/d).
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