Conveners
User experiments
- Kiyoshi Ueda (Tohoku University)
We report on our recent experimental results of single-shot and single-particle X-ray diffraction of nanoparticles at SACLA. The single-shot diffraction data provided insights into the crystallization kinetics of Xe nanoparticles, where the nanoparticles initially crystallize in the metastable stacking-disordered phase and then transform into the stable fcc phase. In addition, we investigated...
There has been growing interest in using ultrafast light pulses to drive materials into nonequilibrium states with novel properties. Using time-resolved X ray scattering, I demonstrated that SnSe, one of the IV-VI resonantly bonded compounds, hosts a novel photo-induced lattice instability associated with an orthorhombic distortion of the rock-salt structure with space group Immm [1]. The new...
Dimensionality plays a key role for the emergence of ordered phases such as charge-density-waves (CDW), which can couple to, and modulate, the topological properties of matter.
In this work, we study the out-of-equilibrium dynamics of the paradigmatic quasi-one-dimensional material (TaSe$_4$)$_2$I, that exhibits a transition into an incommensurate CDW phase when cooled just below room...
Time-resolved experiments are increasingly relevant in modern FEL user facilities. With the FLASH2020+ upgrade project, the pump-probe capabilities of the FLASH will be extended. Besides offering fixed wavelengths (1030 nm fundamental and its harmonics), tunable wavelengths are under development: sub-150 fs long tunable mid-infrared (2-5 microns) pulses for the solid-state community and sub-40...