Gunn domain propagation in non-uniformly doped samples

Abstract

This paper describes a method which is applicable in certain cases to determine the domain field distribution in the Gunn effect in the case of inhomogeneously doped samples. The method makes use of the steady-state solutions of domain dynamics. Evaluation for a special domain model shows that the domain current reproduces the doping profile almost linearly and that the doping fluctuation increases the triggered-mode threshold field but does not alter the domain velocity appreciably.