Imaging ultrafast electronic motion by x-ray scattering

28th International Conference on Photonic, Electronic and Atomic Collisions

Dixit, Gopal^1,2 ; Santra, Robin^1,2,3

Center for Free-Electron Laser Science, DESY, Notkestrasse 85, Hamburg

22607, Germany^1

Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, Hamburg

22761, Germany^2

Department of Physics, University of Hamburg, Hamburg

20355, Germany^3

关键词: Electronic charge distribution;    Electronic density;    Electronic motions;    Electronic wave packets;    Nonstationary;    Scattering pattern;    Spatial and temporal correlation;    Total scattering;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/1/012009/pdf
DOI  :  10.1088/1742-6596/488/1/012009

来源: IOP

【 摘 要 】

Time-resolved ultrafast x-ray scattering is an emerging approach to probe the temporally evolving electronic charge distribution in real-space and in real-time. In this contribution, time-resolved ultrafast x-ray scattering from an electronic wave packet is presented. It is shown that the spatial and temporal correlations are imprinted in the scattering patterns, obtained by ultrafast x-ray scattering from an electronic wave packet, which deviate drastically from the notion that the instantaneous electronic density is the key quantity being probed. Furthermore, a detailed analysis of ultrafast x-ray scattering from a sample containing a mixture of non-stationary and stationary electrons along with the role of scattering interference between a non-stationary and several stationary electrons to the total scattering signal is discussed.