Sub-picosecond Light And electron pulse to Manipulate magnetization

磁有序对超快光激发的动态响应是现代磁学的一个有趣的问题。事实上，1996年光致超快退磁和2007年全光开关的发现为亚皮秒时间尺度上的技术应用的发展铺平了道路。飞秒激光脉冲激发铁磁体后出现的一个突出且未解决的问题在于直接光激发和随后产生的超快自旋电流之间的相互作用，从而导致各种类型的超快磁化操纵。理解和控制这些过程可以导致在超短时间尺度上操作的组合光磁/自旋电子器件。在这个项目中，我们将联合收割机与实验相结合，利用最先进的实验技术和从头算方法来理解和预测光和电流对自旋动力学的贡献

The dynamic response of magnetic order to ultrafast optical excitation is a fascinating issue of modern magnetism. Indeed, the discoveries of light-induced ultrafast demagnetization in 1996 and all-optical switching in 2007 paved the way towards the development of technological applications operating on the sub-picosecond time scale. One outstanding and unsolved problem occurring after the femtosecond laser pulse excitation of ferromagnets resides in the interplay between direct light excitation and the subsequent generated ultrafast spin current resulting in various type of ultrafast magnetization manipulation. Understanding and controlling such processes can lead to combined optomagnetic/spintronic devices operating on ultra-short timescale. In this project, we will combine theory and experiment to investigate and disentangle contributions from light and current to the spin dynamics using state of the art experimental techniques and ab-initio, method of time-dependent density functional theory to understand and predict