论文标题
Pohang Accelerator实验室X射线免费电子激光器的时间分辨谐振弹性X射线散射
Time-resolved resonant elastic soft X-ray scattering at Pohang Accelerator Laboratory X-ray Free Electron Laser
论文作者
论文摘要
共振弹性X射线散射已被广泛用于探索复杂的电子排序现象，例如电荷，自旋和轨道顺序，尤其是在密切相关的电子系统中。此外，泵探针X射线散射的最新发展使我们能够扩大对此类订单的时间动力学的研究。在这里，我们介绍了在Pohang Accelerator Laborator Laborator X射线免费电子激光器（PAL-XFEL）上开发的新的时间分辨的谐振软X射线散射（TR-RSXS）。该端域具有光学激光器（800 nm加谐波的波长）作为泵源。基于调试结果，PAL-XFEL的TR-RSX可以提供软X射线探针（400-1300 eV），其时间分辨率约为100 fs，而无需校正。举例来说，证明了电荷密度波的时间动力学在高温铜酸盐超导体上。
Resonant elastic X-ray scattering has been widely employed for exploring complex electronic ordering phenomena, like charge, spin, and orbital order, in particular in strongly correlated electronic systems. In addition, recent developments of pump-probe X-ray scattering allow us to expand the investigation of the temporal dynamics of such orders. Here, we introduce a new time-resolved Resonant Soft X-ray Scattering (tr-RSXS) endstation developed at the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL). This endstation has an optical laser (wavelength of 800 nm plus harmonics) as the pump source. Based on the commissioning results, the tr-RSXS at PAL-XFEL can deliver a soft X-ray probe (400-1300 eV) with a time resolution about ~100 fs without jitter correction. As an example, the temporal dynamics of a charge density wave on a high-temperature cuprate superconductor is demonstrated.
