论文标题
拓扑抗衡驱动的线性磁电效应在拓扑抗Fiferromagnet Cu $ _3 $ _3 $ _6 $
Spin-Reorientation-Driven Linear Magnetoelectric Effect in Topological Antiferromagnet Cu$_3$TeO$_6$
论文作者
论文摘要
寻找节能电子设备的新材料已变得前所未有。在驱动此搜索的各种磁性材料中，有抗铁磁铁，磁电磁以及具有拓扑激发的系统。 Cu $ _3 $ TEO $ _6 $是属于所有三个类的材料。将静态电化极化和磁性扭矩测量与现象学模拟相结合，我们证明需要考虑磁场诱导的自旋重新定向，以了解Cu $ _3 $ _3 $ _3 $ teo $ _6 $中的线性磁电（ME）效应。我们的计算表明，磁场将系统从非极地基态推向极性磁性结构。但是，由于磁场诱导的某些对称性对计算的结构的破裂较弱，因此非极性结构与获得的极性结构仅存在薄弱。在这些对称性中，有$ pt $（$ \ overline {1}'$）对称性，保留在Cu $ _3 $ _3 $ teo $ _6 $中的狄拉克点。我们的发现建立了Cu $ _3 $ teo $ _6 $，作为研究与Spintronics相关现象相互作用的有前途的操场。
The search for new materials for energy-efficient electronic devices has gained unprecedented importance. Among the various classes of magnetic materials driving this search are antiferromagnets, magnetoelectrics, and systems with topological spin excitations. Cu$_3$TeO$_6$ is a material that belongs to all three of these classes. Combining static electric polarization and magnetic torque measurements with phenomenological simulations we demonstrate that magnetic-field-induced spin reorientation needs to be taken into account to understand the linear magnetoelectric (ME) effect in Cu$_3$TeO$_6$. Our calculations reveal that the magnetic field pushes the system from the nonpolar ground state to the polar magnetic structures. However, nonpolar structures only weakly differing from the obtained polar ones exist due to the weak effect that the field-induced breaking of some symmetries has on the calculated structures. Among those symmetries is the $PT$ ($\overline{1}'$) symmetry, preserved for Dirac points found in Cu$_3$TeO$_6$. Our findings establish Cu$_3$TeO$_6$ as a promising playground to study the interplay of spintronics-related phenomena.
