Optical pump – THz probe response of VO2 under high pressure Johannes M. Braun, Harald Schneider, Manfred Helm, Rafał Mirek, Lynn A. Boatner, Robert E. Marvel, Richard F. Haglund and Alexej Pashkin EPJ Web Conf., 205 (2019) 04003 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920504003