Observation of resonant tunneling effects in a three-terminal device

Abstract
We present the results of studying the resonant tunneling into a single quantum well (SQW) in a three-terminal device. The resonant process manifests itself as a peak and negative-resistance effect in lateral current in the SQW, the amplitude and position of the peak being controlled by the third collector, electrode. In addition, a peak of resonant current with a pronounced negative transconductance was simultaneously measured in the collector circuit as a result of real-space hot-electron transfer from the SQW to the collector.