Speaker
Description
X-ray free-electron lasers (XFELs) offer two key advantages over synchrotron sources for studying ultrafast phenomena: superior temporal resolution and significantly higher coherent photon flux. Here, I will highlight how these two capabilities can be exploited to investigate nonequilibrium phase transitions in quantum materials using time-resolved X-ray scattering. First, I will demonstrate how time-resolved X-ray diffraction with three-dimensional reciprocal-space resolution allows us to identify the coherent phonon modes and interlayer dynamics underlying the nonthermal transition to the hidden charge-density-wave (CDW) phase in 1T-TaS₂. I will then turn to coherent X-ray diffraction, showing how speckle patterns can be used to probe the fluctuation timescales of nanoscale heterogeneities, focusing on trimeron domains associated with charge order in magnetite (Fe₃O₄).
| Type of presence | Presence online |
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