GAMMA-X TRANSFER AND RESONANT-TUNNELING IN ALAS GAAS TRIPLE-BARRIER STRUCTURE/

We have observed the enhanced resonant tunneling effect in the low vol tage range and the electron transfer through the X-valley-confined sta tes of the middle barrier between the two main resonant tunneling-curr ent peak voltages. The experimental observations show good agreement w ith the theoretical predictions based on the scattering theoretic appr oach of the Green's function theory, which can handle electron interla yer intervalley propagation through a layered aperiodic heterostructur e under an external bias.