Nonequilibrium Acoustic Phonon-Assisted Tunneling in GaAs/(AlGa)As Double Barrier Devices

Abstract
We report the first observations of nonequilibrium phonon-assisted tunneling in a double barrier resonant tunneling device in GaAs. The change in tunnel current produced by the phonons occurs at a bias voltage, which depends on the phonon energy showing that the device has potential as a phonon spectrometer.