中心对称四边形主体中的正交畸变和矩形斯基子晶体

IF 2.9 4区物理与天体物理 Q2 OPTICS

Journal of Nonlinear Optical Physics & Materials Pub Date : 2022-12-14 DOI:10.1088/2515-7639/acab89

S. Hayami

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引用次数: 7

摘要

从理论上研究了中心对称四边形磁体中无四重旋转对称的矩形斯基子晶体在正交畸变下的稳定性。通过数值模拟退火得到了具有动量空间竞争相互作用和磁各向异性的有效自旋模型。在改变正交畸变引起的相互作用比的情况下，通过构建低温相图，我们发现矩形斯基米子晶体在外磁场中对畸变保持稳定。我们发现，当磁场增加时，四重旋转对称的程度趋于恢复。还讨论了与skyrmicon承载材料EuAl4的相关性。

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Orthorhombic distortion and rectangular skyrmion crystal in a centrosymmetric tetragonal host

We theoretically investigate the stability of a rectangular skyrmion crystal without fourfold rotational symmetry under an orthorhombic distortion in centrosymmetric tetragonal magnets. The results are obtained by numerically simulated annealing for an effective spin model with competing interactions in momentum space and magnetic anisotropy. By constructing the low-temperature phase diagram while changing the interaction ratio arising from the orthorhombic distortion, we find that the rectangular skyrmion crystal remains stable in an external magnetic field against distortion. We show that the degree of fourfold rotational symmetry tends to recover when the magnetic field is increased. The relevance to the skyrmion-hosting material EuAl4 is also discussed.

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来源期刊

Journal of Nonlinear Optical Physics & Materials 物理-光学

CiteScore

3.00

自引率

48.10%

发文量

审稿时长

3 months

期刊介绍： This journal is devoted to the rapidly advancing research and development in the field of nonlinear interactions of light with matter. Topics of interest include, but are not limited to, nonlinear optical materials, metamaterials and plasmonics, nano-photonic structures, stimulated scatterings, harmonic generations, wave mixing, real time holography, guided waves and solitons, bistabilities, instabilities and nonlinear dynamics, and their applications in laser and coherent lightwave amplification, guiding, switching, modulation, communication and information processing. Original papers, comprehensive reviews and rapid communications reporting original theories and observations are sought for in these and related areas. This journal will also publish proceedings of important international meetings and workshops. It is intended for graduate students, scientists and researchers in academic, industrial and government research institutions.