Relativistic domain-wall dynamics in van der Waals antiferromagnet MnPS3
Relativistic domain-wall dynamics in van der Waals antiferromagnet MnPS3
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DOI：
10.1038/s41524-021-00683-6
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发表时间：
2022-01-13
影响因子：
9.7
通讯作者：
Santos, Elton J. G.
中科院分区：
文献类型：
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作者：
Alliati, Ignacio M.;Evans, Richard F. L.;Santos, Elton J. G.
二维 (2D) 磁性范德华 (vdW) 材料的发现推动了解决基本问题以及计算、传感和存储技术中潜在应用的努力。特别令人感兴趣的是反铁磁体，由于其固有的交换耦合，它显示出与铁磁体相关的几个优点，例如对外部磁扰动的鲁棒性。在这里，我们表明，尽管有这个基石，最近发现的 2D vdW MnPS3 反铁磁体的磁域可以通过磁场和电流进行控制。我们在相对论运动学中实现了速度高达 3000 m s(-1) 的超快畴壁动力学。观察到太赫兹间隙中的洛伦兹收缩和自旋波发射取决于层的边缘终止。我们的结果表明，二维反铁磁体在实际应用中的实现可以通过边缘工程进一步控制，边缘工程为具有相对论特征的超薄设备平台设置功能特性。
The discovery of two-dimensional (2D) magnetic van der Waals (vdW) materials has flourished an endeavor for fundamental problems as well as potential applications in computing, sensing and storage technologies. Of particular interest are antiferromagnets, which due to their intrinsic exchange coupling show several advantages in relation to ferromagnets such as robustness against external magnetic perturbations. Here we show that, despite of this cornerstone, the magnetic domains of recently discovered 2D vdW MnPS3 antiferromagnet can be controlled via magnetic fields and electric currents. We achieve ultrafast domain-wall dynamics with velocities up to similar to 3000 m s(-1) within a relativistic kinematic. Lorentz contraction and emission of spin-waves in the terahertz gap are observed with dependence on the edge termination of the layers. Our results indicate that the implementation of 2D antiferromagnets in real applications can be further controlled through edge engineering which sets functional characteristics for ultrathin device platforms with relativistic features.