Time- and Angle-Resolved Photoemission of Quantum Materials

The phase diagram of copper-oxides hosts intertwined phases as disparate as high-temperature superconductivity, charge order and the pseudogap. In the last decade the development of time-resolved techniques has offered a novel perspective for investigating dynamical properties of quantum phases. In this regard, we recently demonstrated that time-resolved photoemission spectroscopy can disentangle the dynamics of phase fluctuations and charge excitation, establishing the dominant role of phase coherence in the emergence of high-temperature superconductivity in Bi-based cuprates [1]. We employed this same dynamical approach to reveal unambiguously the relation of the pseudogap and short-range antiferromagnetic correlations in optimally-doped NCCO electron-doped cuprate [2], providing clear evidence of the role of short-range correlations in defining the Fermi surface topology. Finally, I will propose a way to redefine the paradigms of the TR-APRES analysis accessing the mode-projected electron-phonon matrix element in graphite in an ultrafast fashion [3]. \\ \\In Collaboration With: Marta Zonno, MengXing Na, Elia Razzoli, Ryan P. Day, Matteo Michiardi, Sergey Zhdanovich, Arthur K. Mills, Giorgio Levy, David J. Jones, Andrea Damascelli; University of British Columbia - Quantum Matter Institute, Eduardo H. da Silva Neto; UC Davis, Claudio Giannetti; Universita Cattolica, Brescia [1] Boschini et al., Nat. Mat. 17, 416 (2018) [2] Boschini*, Zonno* et al., arXiv:1812.07583 (2018) [3] Na*, Mills*, Boschini et al., arXiv:1902.05572 (2019)