Time-resolved measurements provide a new way to disentangle complex interactions in quantum materials due to their different timescales. We used pump-probe Raman scattering to investigate the apical oxygen vibration in ${\mathrm{YBa}}_2{\mathrm{Cu}}_3{\mathrm{O}}_{6+x}$ under nonequilibrium conditions. Time dependence of the phonon population demonstrated strong electron-phonon coupling. Most importantly, the phonon shifts to a higher energy due to transient smearing of the Fermi surface in a remarkable agreement with diagrammatic theory. We also discuss insights into photoinduced superconductivity reported at lower doping that follow from these results.

Close

PrevNext

View figure in article

• Anharmonic lattice dynamics
• Electron-phonon coupling
• Impurities in superconductors
• Superconducting fluctuations
• Superconducting phase transition
• Cuprates
• High-temperature superconductors
• Optical absorption spectroscopy
• Raman spectroscopy