A Monte Carlo method has been used to calculate the velocity-field relationship for n-type indium antimonide at 77°K. Although a negative differential mobility due to the nonparabolicity of the (000) valley is predicted in agreement with previous theories, it is shown that the transfer of electrons to the 〈 111 〉 valleys produces a much larger negative differential mobility at lower electrical field strengths.
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Fawcett et al. (1969) studied this question.
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