论文标题
磁过渡金属二核苷的Janus单层作为自旋轨道扭矩的多合一平台
Janus Monolayers of Magnetic Transition Metal Dichalcogenides as an All-in-One Platform for Spin-Orbit Torque
论文作者
论文摘要
从理论上讲，我们可以预测，钒基二甲基元化的单层构成了自旋轨道旋转记忆的理想平台。使用第一原理计算，我们证明了较重的chalcogen原子的磁交换和磁各向异性能量较高，而Janus形式中的倒置对称性则导致Rashba样旋转轨道偶联的出现。使用优化的量子传输方法评估自旋轨道扭矩效率，并发现与重型非磁性金属相当。具有可调Fermi-Level的此类材料中磁性和自旋轨道耦合的共存为监测磁化动力学的新可能性从非挥发性磁性随机访问记忆的角度开始。
We theoretically predict that vanadium-based Janus dichalcogenide monolayers constitute an ideal platform for spin-orbit-torque memories. Using first principles calculations, we demonstrate that magnetic exchange and magnetic anisotropy energies are higher for heavier chalcogen atoms, while the broken inversion symmetry in the Janus form leads to the emergence of Rashba-like spin-orbit coupling. The spin-orbit torque efficiency is evaluated using optimized quantum transport methodology and found to be comparable to heavy nonmagnetic metals. The coexistence of magnetism and spin-orbit coupling in such materials with tunable Fermi-level opens new possibilities for monitoring magnetization dynamics in the perspective of non-volatile magnetic random access memories.
