Raman study on dislocation in high Al content AlxGa1−xN X. Pan, X.L. Wang, H.L. Xiao, C.M. Wang, C. Feng, L.J. Jiang, H. Yin and H. Chen Eur. Phys. J. Appl. Phys., 58 1 (2012) 10102 Published online: 29 March 2012 DOI: 10.1051/epjap/2012120004