论文标题
超快速光学诱导的磁态在2D抗铁磁铁中
Ultrafast optically induced magnetic state transition in 2D antiferromagnets
论文作者
论文摘要
在抗磁磁性（AFM）材料中操纵自旋在AFM Opto-Spintronics中具有巨大的潜力。激光脉冲可以在AFM金属系统中诱导瞬态铁磁（FM）状态，但从未在二维（2D）AFM半导体和相关的Van der Waals（VDW）异质结构中得到证明。在这里，使用FM MNS2和AFM MXENES的2D VDW异质结构作为原型，我们研究了基于实时时间依赖时间依赖性密度功能理论（RT-TDDFT）的光学诱导的层间自旋传递动力学。我们观察到激光脉冲会诱导明显的自旋注射和界面原子介导的自旋转移从MNS2到CR2CCL2。特别是，我们首先在光激发过程中首先证明了半导体AFM/FM异质结构中的瞬态FM状态。因为接近磁性破坏了异质结构中CR2CCL2的磁对称性。我们的结果为2D磁异质结构中光学控制的层间旋转动力学提供了微观理解，并打开了一种在超快光旋转中操纵磁序的新方法。
Manipulating spin in antiferromagnetic (AFM) materials has great potential in AFM opto-spintronics. Laser pulses can induce a transient ferromagnetic (FM) state in AFM metallic systems, but have never been proven in two-dimensional (2D) AFM semiconductors and related van der Waals (vdW) heterostructures. Here, using 2D vdW heterostructures of FM MnS2 and AFM MXenes as prototypes, we investigated optically induced interlayer spin transfer dynamics based on the real-time time-dependent density functional theory (rt-TDDFT). We observed that laser pulses induce significant spin injection and the interfacial atom-mediated spin transfer from MnS2 to Cr2CCl2. In particular, we first demonstrated the transient FM state in semiconducting AFM/FM heterostructures during photoexcited processes. Because the proximity magnetism breaks the magnetic symmetry of Cr2CCl2 in heterostructures. Our results provide the microscopic understanding for optically controlled interlayer spin dynamics in 2D magnetic heterostructures and open a new way to manipulate magnetic orders in ultrafast opto-spintronics.
