Compass-anisotropy-modulated helical states and skyrmion crystals in chiral magnets
Compass-anisotropy-modulated helical states and skyrmion crystals in chiral magnets
复制标题
手性磁体中罗盘各向异性调制的螺旋态和斯格明子晶体
DOI：
10.1016/j.physleta.2018.06.035
复制
发表时间：
2018-10-12
影响因子：
2.6
通讯作者：
Liu, J-M
中科院分区：
文献类型：
--
作者：
Chen, J. P.;Zhang, Dan-Wei;Liu, J-M
罗盘型各向异性自然出现在具有强自旋轨道耦合的手征磁体中。在这项工作中，我们调查的关键作用罗盘各向异性调制各种自旋织构的手征磁体，通过蒙特卡罗模拟。模拟结果揭示了一个渐进的螺旋重新取向和不同的对称性的skyrmion晶体结构作为指南针各向异性的函数。此外，一个扩展的连续自旋模型与晶格离散化各向异性的建议来解释依赖于指南针各向异性的螺旋和skyrmion晶体结构。结果表明，特定的螺旋传播方向有利于由自旋相互作用在离散晶格中产生的高阶晶格各向异性。此外，通过解析方法确定了螺旋结构的一些阈值。(C)2018爱思唯尔B.V.保留所有权利。
The compass-type anisotropy appears naturally in chiral magnets with strong spin-orbit coupling. In this work, we investigate the critical roles of compass anisotropy in modulating various spin textures of chiral magnets, by Monte Carlo simulations. The simulated results reveal a gradual helical reorientation and varying symmetry of skyrmion crystal structures as a function of compass anisotropy. Furthermore, an extended continuum spin model with the lattice discretization anisotropy is proposed to interpret the dependences of helical and skyrmion crystal structures on the compass anisotropy. It is demonstrated that specific helical propagating directions are favored by the high-order lattice anisotropy arising from spin interactions in discretized lattice. Besides that, some threshold values for the helical structures are identified by analytical approach. (C) 2018 Elsevier B.V. All rights reserved.