AlGaN/GaN/InGaN/GaN DH-HEMTs with GaN channel layer grown at high temperatureLu Zhang, Xiaoliang Wang, Hongling Xiao, Hong Chen, Chun Feng, Guangdi Shen, Zhanguo Wang and Xun HouEur. Phys. J. Appl. Phys., 62 2 (2013) 20105DOI: https://doi.org/10.1051/epjap/2013120390