SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 33: Many-Body Quantum Dynamics (joint session DY/TT)

TT 33.7: Vortrag

Mittwoch, 29. März 2023, 11:15–11:30, MOL 213

ultrafast gap dynamics near the zone boundary in a cuprate superconductor — •qinda guo, maciej dendzik, magnus berntsen, cong li, wanyu chen, yang wang, dibya phuyal, and oscar tjernberg — Department of Applied Physics, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden

The time- and angle- resolved photoemission spectroscopy (tr-ARPES) is a powerful technique to directly probe the ultrafast electron dynamics in the momentum space. Our recently developed narrow-bandwidth tr-ARPES setup enabled us to access the ultrafast dynamics of the quasiparticle population as well as the superconducting gap, in the whole surface Brillouin zone of the photoexcited cuprate superconductor (Bi2212). The results show non-trivial dynamics at the d-wave antinode and provide new insights into the enigma of the Cooper-pair formation process and condensation that takes place in the high-temperature cuprate superconductor.