Anisotropie current decay in tellurium due to the acousto‐electric effect

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Abstract
The time dependence of the current decay due to the acousto‐electric effect was measured in p‐type tellurium at 77 K. The dependence of the current decay on the crystallographie orientation, the carrier density, and the carrier mobility was investigated. The experimental results for drift fields parallel to the x‐ or y‐axis agree with the theory of acousto‐electric amplification. A current decay was also found for a drift field along the z‐axis. This coupling is about a third of that in the x‐direction, but according to the theory of piezoelectric effect in tellurium no coupling is expected.