Ultrafast Hot Electron Induced Phase Transitions in Vanadium Dioxide M. Hada, Y. Hontani, R. E. Marvel, R. F. Haglund Jr. and J. Matsuo EPJ Web of Conferences, 41 (2013) 03005 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134103005