The design of GaAs/AlAs resonant tunneling diodes with peak current densities over 2×105 A cm−2

Abstract
A coherent transport model is described which accommodates bandstructure nonparabolicity by using a ‘‘local energy parabolic band approximation.’’ The model and a knowledge of its limitations is used to design resonant tunneling diodes in the GaAs/AlAs material system with measured peak current densities of 2.5(2.8)×105 A cm−2 concurrent with peak‐to‐valley ratios as high as 1.8 (3.1) at room temperature (77 K).