Plastic relaxation through buried cracks in AlGaN/GaN heterostructures J.-M. Bethoux, P. Vennéguès, M. Laügt and P. De Mierry Eur. Phys. J. Appl. Phys., 27 1-3 (2004) 263-265 Published online: 15 July 2004 DOI: 10.1051/epjap:2004119-3