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Dipartimento di Fisica - Politecnico di Milano

[05/10/2018 - 10:30]

Prof. Andrea Damascelli (Quantum Matter Institute and Physics & Astronomy Department, UBC, Vancouver Canada)

"New approaches in time-resolved ARPES"


ven 02/10/2018 - 10:30 - Aula Rossa, Dipartimento di Fisica



In this talk I will discuss recent results obtained in time and angle-resolved photoemission spectroscopy (ARPES) on quantum materials, utilizing ultrafast laser-based sources generating ultraviolet photons in the 6-40 eV range, with 190 fs and 20 mev time and energy resolutions, respectively. On the high-temperature superconducting cuprates, we obtained evidence for the collapse of superconductivity via ultrafast quenching of phase coherence [1] as well as of the vanishing of the pseudogap via quenching of the spin-correlation length. We also developed a novel approach for the direct determination of mode-projected electron-phonon coupling in the time-domain, with unprecedented sensitivity, and demonstrate its application to the case of graphite and its Dirac-like dispersion.

[1] F. Boschini et al., Nature Materials 17, 416 (2018).

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