论文标题
用电流梳理手性磁铁的螺旋相
Combing the helical phase of chiral magnets with electric currents
论文作者
论文摘要
铁磁交换相互作用与抗对称的Dzyaloshinskii-Moriya相互作用之间的竞争可以稳定螺旋相或支持天空的形成。在手性磁铁的薄膜中，电流密度可能足够大，可以脱离螺旋相并揭示其非平凡动力学。从理论上讲，我们在自旋转移扭矩下研究螺旋相的动力学，这些动力学揭示了不同的方向过程，这是由散装中的拓扑缺陷或边缘引起的，受到较高电流的不稳定性的限制。我们的实验证实了按需通过电流脉冲切换螺旋方向的可能性。在将来的SpinTronics应用中，这种螺旋取向可能是新的订单参数。
The competition between the ferromagnetic exchange interaction and anti-symmetric Dzyaloshinskii-Moriya interaction can stabilize a helical phase or support the formation of skyrmions. In thin films of chiral magnets, the current density can be large enough to unpin the helical phase and reveal its nontrivial dynamics. We theoretically study the dynamics of the helical phase under spin-transfer torques that reveal distinct orientation processes, driven by topological defects in the bulk or induced by edges, limited by instabilities at higher currents. Our experiments confirm the possibility of on-demand switching the helical orientation by current pulses. This helical orientation might serve as a novel order parameter in future spintronics applications.
