Heteroepitaxial sputtered Ge on Si (100): Nanostructure and interface morphology S. M. Pietralunga, M. Feré, M. Lanata, D. Piccinin, G. Radnóczi, F. Misják, A. Lamperti, M. Martinelli and P. M. Ossi EPL, 88 2 (2009) 28005 Published online: 06 November 2009 DOI: 10.1209/0295-5075/88/28005