Time-resolved resonant soft x-ray scattering study on charge density wave in YBCO*

Charge order / charge density wave (CO/CDW) have been observed in the most of cuprate superconductor families by x-ray scattering and they are considered as ubiquitous features in cuprate superconductors. To understand their properties and relation to superconductivity, the CDW have been investigated as a function of temperature, external magnetic field, doping, and other conditions.
In this study, we have investigated the temporal dynamics of the CDW in YBa₂Cu₃O_6+x single crystal using time-resolved resonant soft x-ray scattering (tr-RSXS) at the newly developed RSXS endstation of the PAL-XFEL. Using infrared optical pump, CDW correlation changes within a few picosecond time window. Detailed results, i.e. temperature and fluence dependence, will be discussed in the presentation.