论文标题
从第一原理的多铁bifeo3中的自旋流动驱动的dzyaloshinskii-moriya互动
Spin-current driven Dzyaloshinskii-Moriya interaction in the multiferroic BiFeO3 from first-principles
论文作者
论文摘要
镁的电气控制为逻辑设备运输和处理信息开辟了新的方法。在磁性多表演中，dzyaloshinskii-moriya（DM）相互作用直接允许这种对照，因此至关重要。我们基于密度函数理论，在多效BifeO3的R3C散装相中，确定了（匡威）自旋电流DM相互作用的起源和强度。我们的数据仅支持源自自旋电流模型的一个DM相互作用贡献。通过探索整个Brillouin区域中的磁通分散，我们表明交换是各向同性的，但是DM相互作用和各向异性更喜欢在完整（111）平面内的任何传播和任何磁化方向。我们的工作强调了旋转电流引起的不对称电位的重要性，这比由bifeo3等多铁质中的阴离子八面体引起的结构不对称。
The electrical control of magnons opens up new ways to transport and process information for logic devices. In magnetoelectrical multiferroics, the Dzyaloshinskii-Moriya (DM) interaction directly allow for such a control and, hence, is of major importance. We determine the origin and the strength of the (converse) spin current DM interaction in the R3c bulk phase of the multiferroic BiFeO3 based on density functional theory. Our data supports only the existence of one DM interaction contribution originating from the spin current model. By exploring then magnon dispersion in the full Brillouin Zone, we show that the exchange is isotropic, but the DM interaction and anisotropy prefer any propagation and any magnetization direction within the full (111) plane. Our work emphasizes the significance of the asymmetric potential induced by the spin current over the structural asymmetry induced by the anionic octahedron in multiferroics such as BiFeO3.
