Project supported by the National Natural Science Foundation of China (Grant No.10774090);the National Basic Research Program of China (Grant No.2007CB936602)
Ni Schottky contacts on A1GaN/CaN heterostructures were fabricated. Some samples were thermally treated in a furnace with N2 ambience at 600 ~C for different times (0.5 h, 4.5 h, 10.5 h, 18 h, 33 h, 48 h, and 72 h),...