Resonant Tunneling in a Novel Coupled-Quantum-Well Base Transistor

Resonant tunneling in a novel coupled-quantum-well (CQW) base transistor is investigated. The CQW-base structure is confirmed through secondary ion mass spectroscopy and transmission electron microscopy. Transconductance measurements reveal that the collector current is attributable to resonant tunneling transfer from the emitter to collector through the modified energy states in the CQW-base. Current gain β as large as 5.5 is observed for the first time with respect to the resonant tunneling current.