Special CPM Seminar

Time- and angle-resolved photoemission of quantum materials

Fabio Boschini

Stewart Blusson Quantum Matter Institute
UBC

The extension of angle-resolved photoemission spectroscopy into the time domain (TR-ARPES) has offered the unique opportunity to access low-energy electronic properties with momentum, energy and time resolution. In this regard, we demonstrated that TR-ARPES 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 recently employed this same dynamical approach to reveal the competition between charge-order and superconductivity in Y-based cuprates in the time-domain [2], as well as demonstrate the intimate relationship between the pseudogap and the short-range antiferromagnetic correlations in electron-doped cuprates [3].

Finally, I will propose a way to redefine the paradigms of the TR-ARPES analysis and access the mode-projected electron-phonon matrix element in graphite in an ultrafast fashion [4].

[1] Boschini et al., Nature Materials 17, 416-420 (2018)
[2] Wandel, Boschini et al., in preparation (2020)
[3] Boschini, Zonno et al., arXiv:1812.07583i (2018)
[4] Na, Mills, Boschini et al., Science 366, 1231-1236 (2019)