High-quality quantum point contacts in GaN/AlGaN heterostructures

High-quality quantum point contacts in GaN/AlGaN heterostructures
H. T. Chou, S. Luscher, D. Goldhaber-Gordon, M. J. Manfra, A. M. Sergent, K. W. West, and R. J. Molnar.. Applied Physics Letters 86, 073108 [PDF]