Over the last few years the field of ultrafast spectroscopy has opened new frontiers in the study of correlated materials. For instance, extension in the time-resolved regime of Angle-resolved photoemission spectroscopy (TR-ARPES), has revealed to be a powerful technique to study of unconventional superconductivity.
In the first part of this contribution I will present our TR-ARPES measurements on the cuprate Bi2Sr2CaCu2O8+δ. By employing a pulse of duration comparable to the timescales of the superconducting state we demonstrate the capability of the pump pulse to manipulate the phase fluctuations  and the electron-bosons coupling  independently of the pairing.
More recently, Free Electrons Lasers (FEL) have developed as a powerful tool to perform ultrafast spectroscopy in the XUV, Soft- and Hard- X-ray. In the second part of the talk I will introduce the experimental endstation Furka of the soft x-ray branch (Athos) of the SwissFEL . The Furka experimental endstation will be dedicated to time-resolved Resonant Inelastic and Elastic X-ray Scattering (tr-RIXS and tr-REXS) as well as X-Ray Diffraction (tr-XRD) in the soft X-ray regime. In particular, tr-RIXS opens new scientific opportunities thanks to its unique capability to probe the energy and momentum time-evolution of elementary excitations in solids.
 F. Boschini, E. H. da Silva Neto, E. Razzoli, et al., “Collapse of superconductivity in cuprates via ultrafast quenching of phase coherence” Nature Materials 17, 416(2018).
 E. Razzoli*, F. Boschini* et al., “Ultrafast reduction of electron-boson kink induced by phase coherence loss in cuprates” in submission.
 R. Follath1, U. Flechsig, U. H. Wagner, and L. Patthey, Optical design of the Athos beamlines at SwissFEL, AIP Conference Proceedings 2054, 060024 (2019).
|When?||21.08.2019 11:15 - 12:15|
|Where?||PER 08 0.58.5
Chemin du Musée 3
Paul Scherrer Institut, 5232 Villigen PSI.
|Contact||Département de Physique
Chemin du Musée 3 0
026 300 91 63