Optically Driven Collective Spin Excitations and Magnetization Dynamics in the Néel-type Skyrmion Host GaV_{4}S_{8}.
Optically Driven Collective Spin Excitations and Magnetization Dynamics in the Néel-type Skyrmion Host GaV_{4}S_{8}.
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DOI：
10.1103/physrevlett.122.107203
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发表时间：
2018-08
影响因子：
8.6
通讯作者：
P. Padmanabhan;F. Sekiguchi;R. Versteeg;E. Slivina;V. Tsurkan;S. Bordács;S. Bordács;I. Kézsmárki;I. Kézsmárki;P. V. Loosdrecht
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文献类型：
--
作者：
P. Padmanabhan;F. Sekiguchi;R. Versteeg;E. Slivina;V. Tsurkan;S. Bordács;S. Bordács;I. Kézsmárki;I. Kézsmárki;P. V. Loosdrecht
GaV4S8是一种多铁性半导体，具有磁性摆线（Cyc）和Néel型Skyrmion晶格（SkL）相，具有很宽的热稳定性和磁稳定性。在这里，我们使用时间分辨的磁光克尔光谱显示的相干产生的集体自旋激发的Cyc和SkL阶段。我们的微磁模拟表明，这些驱动的单轴各向异性的光致调制。我们的研究结果揭示了自旋动力学在各向异性材料托管skyrmions和铺平了一条新的途径，其磁序的光学操纵。
GaV_{4}S_{8} is a multiferroic semiconductor hosting magnetic cycloid (Cyc) and Néel-type skyrmion lattice (SkL) phases with a broad region of thermal and magnetic stability. Here, we use time-resolved magneto-optical Kerr spectroscopy to show the coherent generation of collective spin excitations in the Cyc and SkL phases. Our micromagnetic simulations reveal that these are driven by an optically induced modulation of uniaxial anisotropy. Our results shed light on spin dynamics in anisotropic materials hosting skyrmions and pave a new pathway for the optical manipulation of their magnetic order.