Fabrication of quantum point contacts by engraving GaAs/AlGaAs-heterostructures with a diamond tip

J. Regul, U. F. Keyser, M. Paesler +7

We use the all-diamond tip of an atomic force microscope for the direct engraving of high quality quantum point contacts in GaAs/AlGaAs-heterostructures. The processing time is sho…