@article {Novelli2014,
	title = {Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system},
	journal = {Nature communications},
	volume = {5},
	year = {2014},
	pages = {5112},
	publisher = {Nature Publishing Group.},
	address = {London},
	abstract = {The non-equilibrium approach to correlated electron systems is often based on the paradigm that different degrees of freedom interact on different timescales. In this context, photo-excitation is treated as an impulsive injection of electronic energy that is transferred to other degrees of freedom only at later times. Here, by studying the ultrafast dynamics of quasi-particles in an archetypal strongly correlated charge-transfer insulator (La2CuO4+delta), we show that the interaction between electrons and bosons manifests itself directly in the photo-excitation processes of a correlated material. With the aid of a general theoretical framework (Hubbard-Holstein Hamiltonian), we reveal that sub-gap excitation pilots the formation of itinerant quasi-particles, which are suddenly dressed by an ultrafast reaction of the bosonic field.},
	issn = {2041-1723},
	doi = {10.1038/ncomms6112},
	author = {Novelli, Fabio and De Filippis, Giulio and Cataudella, Vittorio and Esposito, Martina and Vergara, Ignacio and Cilento, Federico and Sindici, Enrico and Amaricci, Adriano and Giannetti, Claudio and Prabhakaran, Dharmalingam and Wall, Simon and Perucchi, Andrea and Dal Conte, Stefano and Cerullo, Giulio and Capone, Massimo and Mishchenko, Andrey and Grueninger, Markus and Nagaosa, Naoto and Parmigiani, Fulvio and Fausti, Daniele}
}
