Joint Annual Meeting of SPS and ÖPG 2019

【711】Ultrafast quenching of phase coherence in cuprate superconductors revealed by TR-ARPES

29 Aug 2019, 17:00

30m

G 85

Talk Quantum Beam Science: bio, materials and fundamental physics with neutrons and X-rays Quantum Beam Science: bio, materials and fundamental physics with neutrons and X-rays

Speaker

Elia Razzoli (PSI - Paul Scherrer Institut)

Description

Angle-resolved photoemission spectroscopy (ARPES), and its extension in the time-resolved regime (TR-ARPES), has revealed to be a powerful technique to study of unconventional superconductivity. In this contribution I will present our TR-ARPES measurements on the cuprate Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$. 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 [1] and the electron-bosons coupling [2] independently of the pairing.

[1]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).
[2]E. Razzoli, F. Boschini et al., “Ultrafast reduction of electron-boson kink induced by phase coherence loss in cuprates” in submission(2019).