Strongly correlated electron systems represent complex collective behaviour which with a slight change in doping or temperature, leads to various quantum phases such as pseudogap, charge density wave ordering and superconducting phase.
Here we use the femtosecond optical pulses to drive the system out of equilibrium and study the temporal evolution of superconducting phase and the changes in absorption and emission energies as the system evolves through the transition in optimally doped cuprates (Tc = 91K). The measurements using Multidimensional Coherent Spectroscopy in the superconducting phase (below Tc) reveals dynamics that depend on the absorption energy, indicating that the phase evolution of the excitation that drives the system out of equilibrium is important, in contrast to understanding derived from previous pump-probe measurements.
About the presenter
Rishabh Mishra is a PhD Student working with A/Prof Jeff Davis‘s Ultrafast Spectroscopy group at Swinburne University of Technology. Contributing to FLEET’s Research Theme 3, Light-transformed Materials, Rishabh and Jeff aim to study the electronic correlations and ultrafast coherent dynamics in non-equilibrium quantum matter using coherent multi-dimensional spectroscopy.