A study of BGaN back-barriers for AlGaN/GaN HEMTsJeramy R. Dickerson, Vinod Ravindran, Tarik Moudakir, Simon Gautier, Paul L. Voss and Abdallah OugazzadenEur. Phys. J. Appl. Phys., 60 3 (2012) 30101DOI: https://doi.org/10.1051/epjap/2012120265