AI 中文总结
该研究通过大规模模拟揭示磁场可调控无序斯格明子晶体的拓扑缓冲，区分晶体无序化与拓扑电荷损失，确立拓扑缓冲为拓扑织构在无序介质中保持鲁棒性的机制。
AI 中文摘要
淬火无序可破坏晶体有序性，却不会立即破坏其组成织构的拓扑结构，但斯格明子晶体中这两个过程的关联仍不明确。通过对具有随机DM相互作用的三角晶格手性磁体进行大规模模拟，研究表明磁场会在两种无序化路径中做出选择：在高场下，全局平移相干性在弱无序尺度处丧失，而六重键取向有序性则能在更大的无序强度下保留，总拓扑电荷在大得多的尺度上仍近乎锁定，由此形成的区间定义了一个拓扑缓冲，包含布拉格玻璃态类斯格明子区域及后续的斯格明子玻璃态区域；有限尺寸标度、空间关联、缺陷统计和自旋自相关均支持二者具有不同的结构与玻璃态特征。在低场下，键取向无序化几乎与拓扑重构同时发生，消除了斯格明子玻璃窗口并压缩了拓扑缓冲。这些结果表明磁场是分离晶体无序化与拓扑电荷损失的控制旋钮，确立了拓扑缓冲是拓扑织构在结构无序介质中保持鲁棒性的机制。
英文摘要
Quenched disorder can disrupt crystalline order without immediately destroying the topology of its constituent textures, but the relation between these processes in skyrmion crystals remains unclear. Using large-scale simulations of a triangular-lattice chiral magnet with random DM interactions, we show that the magnetic field selects between two disordering routes. At high fields, global translational coherence is lost at a weak-disorder scale, while sixfold bond-orientational order survives to a larger disorder strength and the total topological charge remains nearly locked up to a substantially larger scale. The resulting interval defines a topological buffer containing a Bragg-glass- like skyrmion regime followed by a skyrmion-glass regime. Finite-size scaling, spatial correlations, defect statistics, and spin autocorrelations support their distinct structural and glassy character. At lower fields, bond-orientational disordering nearly coincides with topological reconstruction, eliminating the skyrmion-glass window and contracting the buffer. These results identify the magnetic field as a control knob for separating crystalline disordering from topological-charge loss and establish topological buffering as a mechanism by which topological textures can remain robust in structurally disordered media.
Comments6 pages, 3 figures
