Inelastic tunneling in AlAs-GaAs-AlAs heterostructures

Current-voltage measurements in AlAs-GaAs-AlAs heterostructures under hydrostatic pressure show that inelastic tunneling through the X AlAs-ΓGaAs discontinuity is reduced as the thickness of the AlAs layers is decreased. This reduction makes possible large peak-to-valley current ratios in resonant tunneling devices with thin AlAs barriers.