Boson Peak Related to Ga Nanoclusters in AlGaN Layers Grown by Plasma-Assisted Molecular Beam Epitaxy at Ga-Rich Conditions - Davydov, V. Yu.; Jmerik, V. N.; Roginskii, E. M.; Kitaev, Yu. E.; Beltukov, Y. M.; Smirnov, M. B.; Nechaev, D. V.; Smirnov, A. N.; Eliseyev, I. A.; Brunkov, P. N.; Ivanov, S. V. (Semiconductors, 2019)