Control of Current in 2DEG Channel by Oxide Wire Formed Using AFM

Abstract
We have succeeded in depleting a two-dimensional electron gas channel using an oxide wire formed with an atomic force microscope. Currents in the channel depend on the height of the oxide wire on the delta-doped high-electron-mobility transistor. The current in the sample with a 20 nm-thick oxide wire is approximately one hundred times lower than that without the wire.