Quantized conductance in an AlAs two-dimensional electron system quantum point contact
Quantized conductance in an AlAs two-dimensional electron system quantum point contact
We report experimental results on a quantum point contact (QPC) device formed in a wide AlAs quantum well where the two-dimensional electrons occupy two in-plane valleys with elliptical Fermi contours. To probe the closely-spaced, one-dimensional electric subbands, we fabricated a point contact device defined by shallow etching and a top …