Real-time observation of the intravalley spin-flip process in single-layer WS2 Zilong Wang, Alejandro Molina-Sanchez, Patrick Altmann, Davide Sangalli, Domenico De Fazio, Giancarlo Soavi, Ugo Sassi, Federico Bottegoni, Franco Ciccacci, Marco Finazzi et al. (5 more) EPJ Web Conf., 205 (2019) 05012 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920505012