SwissFEL sheds light on how lattice and atomic spins jiggle together.
Schematic ultrafast surface diffraction setup used for monitoring the crystal lattice in multiple directions.
Supercooled water scattering signals show an anolmalous structure factor temperature dependence suggesting decreasing density at lowering temperatures below 236 K (-37°C).
A new PSI method allows quantum-physical research on materials with the aid of X-ray lasers.
Light induced propagation strain pulse, converting nanoparticles of Ti3O5 from semiconducting to metallic phase.
FEL-based ultrafast calorimetry measurements show enhancement and maximum in the isobaric specific-heat.
Organic–inorganic ‘hybrid’ perovskites have recently gained attention as a low-cost alternative to silicon solar cells. However, many properties of these materials are still poorly understood. In particular, how imperfections in the crystals, which can be both static or dynamic, affect energy transport remains unclear.
The summer shutdown was used to install more missing hardware. With the new components the Bernina instrument will be already very close to the full design capabilities when the exciting time of user experiments will begin in 2019.
Understanding how and how fast we can drive atoms to create a structural phase transition is of fundamental interest as it directly relates to many processes in nature. Here we show that a photoexcitation can drive a purely structural phase transition before the energy is relaxed in the material that corresponds to a “warmer” equilibrated state.