PdFe/Ir(111) has attracted tremendous attention for next-generation spintronics devices due to existence of magnetic skyrmions with the external magnetic field. Our density functional theoretical calculations in combination with spin dynamics simulation suggest that the spin spiral phase in fcc stacked PdFe/Ir(111) flips into the skyrmion lattice phase around B$_{ext} \sim$ 6 T. This leads to the microscopic understanding of the thermodynamic and kinetic behaviours affected by the intrinsic spin-lattice couplings (SLCs) in this skyrmion material for magneto-mechanical properties. Here we calculate fully relativistic SLC parameters from first principle computations and investigate the effect of SLC on dynamical magnetic interactions in skyrmion multilayers PdFe/Ir(111). The exchange interactions arising from next nearest-neighbors (NN) in this material are highly frustrated and responsible for enhancing skyrmion stability. We report the larger spin-lattice effect on both dynamical Heisenberg exchanges and Dzyaloshinskii-Moriya interactions for next NN compared to NN which is in contrast with recently observed spin-lattice effect in bulk bcc Fe and CrI$_3$ monolayer. Based on our analysis, we find that the effective measures of SLCs in fcc (hcp) stacking of PdFe/Ir(111) are $\sim 2.71 ( \sim 2.36)$ and $\sim 14.71 ( \sim21.89)$ times stronger for NN and next NN respectively, compared to bcc Fe. The linear regime of displacement for SLC parameters is $\leq$ 0.02 Å which is 0.72\% of the lattice constant for PdFe/Ir(111). The microscopic understanding of SLCs provided by our current study could help in designing spintronic devices based on thermodynamic properties of skyrmion multilayers.
Thermal Evolution of Skyrmions in Synthetic Ferrimagnets of Co/Gd Heterostructure for Topological Spintronic Applications
National Institute of Science Education and Research (NISER)（印度科学教育研究所）；Homi Bhabha National Institute (HBNI)（霍米·巴巴国立大学）；Indian Institute of Science Education and Research (IISER) Mohali（印度科学教育研究学院莫哈利分校）；Durham University（杜伦大学）
From picometre displacements to a three-dimensional lattice gas of polar skyrmions
ETH Zürich（苏黎世联邦理工学院）；Argonne National Laboratory（阿贡国家实验室）；Institute of physics, Zagreb（萨格勒布物理研究所）；Luxembourg Institute of Science and Technology（卢森堡科学与技术研究院）；Aarhus University（奥胡斯大学）
Writing and erasing skyrmions by single ultrafast laser pulses in monolayer Janus 2D magnets
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Humboldt-Universität zu Berlin（柏林洪堡大学）；Center for Quantum Matter, School of Physics, Zhejiang University（浙江大学物理学院量子物质中心）；Helmholtz-Zentrum Berlin für Materialien und Energie（柏林亥姆霍兹材料能源研究中心）；University of Chinese Academy of Sciences（中国科学院大学）
Skyrmion and Meron Crystals in Intermetallic Gd$_3$Ru$_4$Al$_{12}$: Microscopic Model Insights into Chiral Phases
University of Science and Technology of China（中国科学技术大学）；University of Tennessee（田纳西大学）；Oak Ridge National Laboratory（橡树岭国家实验室）；RIKEN Center for Emergent Matter Science (CEMS)（理化学研究所新兴物质科学中心）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；The University of Tokyo（东京大学）
Strain-tunable Dzyaloshinskii--Moriya interaction and skyrmions in two-dimensional Janus Cr$_{2}$X$_{3}$Y$_{3}$ (X, Y = Cl, Br, I, X $\neq$ Y) trihalide monolayers
近年来，人们致力于寻找具有强Dzyaloshinskii-Moriya相互作用的二维铁磁材料。在这里，我们通过第一性原理的方法，系统地研究了双轴应变对Janus Cr $_{2}$ X $_{3}$ Y $_{3}$（X，Y = Cl，Br，I，X $\neq$ Y）单分子膜的磁化率，海森堡交换相互作用和磁各向异性能（MAE）的影响。拉伸应变可显著增强双折射和MAE，而$2\%$的压缩应变可诱导Cr $_{2}$ Cl $_{3}$ Br中双折射手性的反转和Cr $_{2}$ I $_{3}$ Cl $_{3}$中MAE从面外到面内的转换。在微观上，磁共振和MAE主要与重磁卤素原子的大自旋-轨道耦合有关，而不是与磁性Cr原子有关。特别是，特殊的磁性转变的Cr $_{2}$ I $_{3}$ Cl $_{3}$之间的竞争直接交换和超交换相互作用解释。微磁学模拟结果表明，外加65 mT的弱磁场能稳定Cr $_2$ I $_3$ Cl $_3$单层膜中直径为9.8 nm的skyrmion.我们的研究结果将为进一步研究二维Janus材料中的Skyrmions和Spin-tron提供指导，并为在自旋电子器件中的潜在应用奠定基础。
Thermodynamic theory of square skyrmion lattice in tetragonal frustrated antiferromagnets
Center for Theoretical Physics of Complex Systems, Institute for Basic Science (IBS)（复杂系统理论物理中心，基础科学研究院）；National Research University “Higher School of Economics”（国立高等经济大学）；The Faculty of Physics of St. Petersburg State University（圣彼得堡国立大学物理系）
Observation by SANS and PNR of pure Néel-type domain wall profiles and skyrmion suppression below room temperature in magnetic [Pt/CoFeB/Ru]$_{10}$ multilayers
Observation of Magnetic-Anisotropy Crossover and High-Temperature Skyrmions in the Dirac Magnet Fe3Ge with a Distorted Kagome Lattice
Zhejiang University of Technology（浙江工业大学）；Fudan University（复旦大学）；Nanjing University of Posts and Telecommunications（南京邮电大学）；Ningbo University（宁波大学）；Academia Sinica（中央研究院）；Shanghai University（上海大学）；Suzhou University of Technology（苏州科技大学）；Qufu Normal University（曲阜师范大学）；National Taiwan Normal University（台湾师范大学）；Zhejiang University（浙江大学）；Shanghai Jiao Tong University（上海交通大学）
Intra-unit-cell resolved intertwining of multi-$Q$ charge and spin textures in an itinerant skyrmion magnet
RIKEN Center for Emergent Matter Science（理化学研究所物质结构科学研究中心）；Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo（东京大学应用物理系及量子相电子研究中心）；Institute for Solid State Physics, University of Tokyo（东京大学固体物理研究所）；Research Center for Advanced Science and Technology, University of Tokyo（东京大学先进科学技术研究中心）
