Gate-controlled double electron layer tunnellingtransistor and single transistor digital logic applications

Abstract
A novel entirely planar quantum transistor based on tunnelling between two separate electron layers in an AlGaAs/GaAs double quantum well heterostructure is demonstrated. Using the gate-tunability of the tunnelling I-V characteristics, digital logic gates such as XOR and NAND are demonstrated using a single double electron layer tunnelling transistor.