Ultrafast Formation of Jahn–Teller Polarons Revealed by State-Selective Excitation in Correlated Spinel Co 3 O 4 - Simone Restelli; Oliviero Cannelli; Nicola Colonna; Carmelo Grova; Paolo Usai; Michele Puppin; Mounir Mensi; Francesco Barantani; Yue Meng; Jérémie Teyssier; Malte Oppermann; Francesco Pennacchio; et al. (Journal of the American Chemical Society, 2026)