论文标题
在呼吸kagome lattice上的零视野海森贝格抗铁磁铁中，基于Skyrmion的紧急性手性秩序
Emergent skyrmion-based chiral order in zero-field Heisenberg antiferromagnets on the breathing kagome lattice
论文作者
论文摘要
我们表明，呼吸kagome晶格上的古典海森伯格抗铁磁铁可以成为一个平台，可以实现标量旋转手性的零视场拓扑顺序，可以将其视为带有少量磁性单位旋转的离散形式的微型Skyrmion Crystal（SKX）。在模型中，沿债券方向$ j_3 $的第三个最近的邻居（NN）抗磁磁相互作用以及呼吸键抗抗性，其特征在于大三角nn相互作用与小型三角形的比率，$ j_1'/j_1 $是必不可少的。通过蒙特卡洛模拟发现，相当三重-U {\ bf Q} $状态在零场的相对强大的$ j_3 $出现的状态是noncoplanar状态，在呼吸中具有SKX结构的$ j_1'/j_1'/j_1 \ neq 1 $，而在统一的IS after Case中，却是from in count of in Suiltial a formal a flytial theyt a thyled $ j_1 $ j_1 $ j_1 $ j_1 $ j_1'$ j_1'$ j_1'$ j_1'$ j_1'$ j_1'$ j_1'$ 1 =波动。还讨论了这种手性顺序的起源和结果的实验意义。
We show that classical Heisenberg antiferromagnets on the breathing kagome lattice can be a platform to realize a zero-field topological order of the scalar spin chirality which can be viewed as a miniature skyrmion crystal (SkX) of discrete form with a small number of spins in its magnetic unit cell. In the model, a third nearest-neighbor (NN) antiferromagnetic interaction along the bond direction $J_3$ and the breathing bond-alternation characterized by the ratio of the NN interaction for large triangles to that for small ones, $J_1'/J_1$, are essential. It is found by means of Monte Carlo simulations that a commensurate triple-${\bf Q}$ state appearing for relatively strong $J_3$ at zero field is the noncoplanar state with the SkX structure in the breathing case of $J_1'/J_1 \neq 1$, while in the uniform case of $J_1'/J_1 =1$, it is a collinear state favored by thermal fluctuations. The origin of this chiral order and experimental implications of our result are also discussed.
