Ultrafast control of spins in magnetically ordered 2D materials (B09*)

我们将研究高质量的少层薄反铁磁半导体。首先，我们将通过分析基态的结构、磁性和电子特性来表征它们，利用各种光谱方法作为几个实验参数的函数。然后，我们将利用在表征过程中开发的知识来光学操纵超快时间尺度上的自旋。特别是，我们的目标是通过直接照明和通过光产生的应变波诱导和控制相干自旋动力学。远程命令的飞秒淬火也将被尝试。作为最后一步，在与超快磁操作相同的激励条件下，我们将揭示整个布里渊区电子能带结构的动力学。

We will study high-quality few-layers-thin antiferromagnetic semiconductors. First, we will characterize them by analyzing the structural, magnetic and electronic properties of the ground state by a wide variety of spectroscopic approaches utilized as function of several experimental parameters. Then, we will employ the knowledge developed during characterization to optically manipulate spin on the ultrafast timescale. In particular, we aim at inducing and controlling coherent spin dynamics by direct illumination and via photogenerated strain waves. A femtosecond quench of the long-range order will be attempted as well. As a final step, under the same excitation conditions as for ultrafast magnetic manipulation, we will disclose the dynamics of the electronic band structure throughout the whole Brillouin zone.