Topological Charge Control of Skyrmion Structure in Frustrated Magnets by Circularly Polarized Light
Topological Charge Control of Skyrmion Structure in Frustrated Magnets by Circularly Polarized Light
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DOI：
10.1103/physrevapplied.18.014075
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发表时间：
2022-07
影响因子：
4.6
通讯作者：
M. Miyata;J. Ohe;G. Tatara
中科院分区：
文献类型：
--
作者：
M. Miyata;J. Ohe;G. Tatara
经典的海森堡模型与-相互作用形成一个skyrmion结构，它的特征是量子化的拓扑荷。由于相互作用的对称性，所产生的拓扑电荷在系统中是随机分布的，并且不是本质可控的。本文从理论上证明了利用圆偏振光可以实现拓扑荷的调控，这是由于光的螺旋度与拓扑荷的耦合产生拓扑逆法拉第效应的机理。这种效应对于控制基于skyrmion的赛道存储器中的拓扑电荷位是有用的。
The classical Heisenberg model with the--interaction forms a skyrmion structure, which is characterized by quantized topological charge. Due to the symmetric interaction, the generated topological charges are randomly distributed in the system, and not controllable intrinsically. Here we show theoretically that manipulation of topological charge can be carried out by applying circularly polarized light, as a result of the mechanism of the topological inverse Faraday effect arising from the coupling of light helicity and topological charge. The effect is expected to be useful for control of the topological charge bit in a skyrmion-based racetrack memory.