标题： 光诱导二维多铁磁体中的自旋倾斜 显示英文标题

标题： Light-Induced Spin Slanting in 2D Multiferroic Magnet

摘要： 控制二维（2D）材料的自旋取向已成为凝聚态物理的前沿领域，导致发现了各种物质相。 然而，在大多数情况下，自旋取向只能在垂直方向和水平方向的特定方向上建立，这与三维系统相比是一个缺点，限制了新物理现象的探索。 在这里，我们介绍了一种通过超快光脉冲操纵二维多铁材料中自旋倾斜的方法。 基于模型分析，我们发现同时触发来自水平方向和垂直方向轨道的自旋-轨道耦合引起的相互作用可以产生自旋倾斜。 通过选择具有特定低能组成并由对称性赋予的二维多铁材料，可以通过超快光照射轻松实现这种触发，从而导致光诱导的自旋倾斜。 使用实时时间依赖密度泛函理论，我们在多铁单层CuCr2Se4中演示了这种方法。 这项研究提供了一种有效操控二维材料中自旋取向的方法，并建立了一个通用平台来探索与自旋倾斜相关的物理和应用。 显示英文摘要

摘要： Controlling spin orientation of two-dimensional (2D) materials has emerged as a frontier of condensed-matter physics, resulting in the discovery of various phases of matter. However, in most cases, spin orientation can be stablished only at specific directions of out-of-plane and in-plane, which is a drawback compared with three-dimensional systems, limiting exploration of novel physics. Here, we introduce a methodology for manipulating spin slanting in 2D multiferroic materials through ultrafast pulses of light. Based on model analysis, we find that simultaneous triggering spin-orbit coupling induced interactions from in-plane and out-of-plane orbitals can generate spin slanting. By choosing 2D multiferroic materials with specific low-energy composition endowed by symmetry, such triggering can be readily achieved through ultrafast light illumination, leading to light-induced spin slanting. Using real-time time-dependent density-functional theory, we demonstrate this approach in multiferroic single-layer CuCr2Se4. This study provides an efficient way to manipulate spin orientation in 2D materials and establishes a general platform to explore physics and applications associated with spin slanting.