Abstract
The effect of the phonon “narrow throat” was experimentally found in n-InSb in crossed electrical and quantizing magnetic fields at temperatures 1.6—4.2°K. The phenomenon of energy relaxation by hot electrons on phonons was detected with T S ⩽ h ̵ λ −1 in the case of absence of a phonon thermal tank ( S is sound velocity, λ is magnetic length, T is temperature). The value of a critical electric field ( E cr ) on the S-type current-voltage characteristic (CVC) was measured as a function of temperature and the magnetic field.
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