Ultrafast Spin-flip dynamics in transition-mental complexes triggered by X-ray light
报告题目：Ultrafast Spin-flip dynamics in transition-mental complexes triggered by X-ray light
报 告 人：王慧慧 博士 德国罗斯托克大学
报告时间：2018年5月12日星期六上午9:00
报告地点：激光光谱研究所三层报告厅
Abstract：
Recent advances in atttosecond physics provided access to the correlated motion of electrons on their intrinsic timescales. Spin-flip dynamics is usually considered in the context of the valence electronic states, where spin-orbit coupling is weak and processes related to the electron spin are usually driven by nuclear motion. However, for core-excited states, where the core-hole has a nonzero angular momentum, spin-orbit coupling is strong enough to drive spin-flips on a much shorter timescales. Using density matrix-based time-dependent restricted active space configuration interaction including spin-orbit coupling, we addressed an unprecedentedly short spin-crossover for the L-edge excited states of a prototypical Fe(II) complex, which occurs on a timescale faster than the core-hole lifetime. Besides, the effect of the nuclear vibrations is incorporated making use of an electronic system plus vibrational bath partitioning. The difference between isolated pulse and pulse trains as well as influence of various pulse characteristics on initiated dynamics are discussed. This study can be potentially used for ultrafast clocking in sub-few fs experiment.
报告人简介：王慧慧，德国罗斯托克大学在读博士生，即将毕业。2011年本科毕业于山西大学物理电子工程学院，2014年硕士毕业于山西大学激光光谱研究所。主要研究方向为X-Ray光谱及超快电子动力学的量子力学模拟，以第一作者发表SCI论文3篇，其中Phys. Rev. Lett.一篇。