Emergent skyrmion-based chiral order in zero-field Heisenberg antiferromagnets on the breathing kagome lattice
Emergent skyrmion-based chiral order in zero-field Heisenberg antiferromagnets on the breathing kagome lattice
复制标题
呼吸戈薇晶格上零场海森堡反铁磁体中基于斯格明子的突现手性序
DOI：
10.1103/physrevb.105.l100407
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发表时间：
2022
影响因子：
3.7
通讯作者：
Kawamura Hikaru
中科院分区：
文献类型：
--
作者：
Aoyama Kazushi;Kawamura Hikaru
我们表明，经典海森堡反铁磁体呼吸kagome晶格可以是一个平台，实现零场拓扑秩序的标量自旋手征，可以被看作是一个微型skyrmion晶体（SkX）的离散形式与少量的自旋在其磁性单元格。在该模型中，沿键方向沿着的第三近邻（NN）反铁磁相互作用和呼吸键交替是必不可少的，其特征在于大三角形的NN相互作用与小三角形的NN相互作用之比。通过Monte Carlo模拟发现，在相对较强的零场作用下，出现的公度三态在呼吸情况下是与SkX结构不共面的态，而在均匀情况下是受热涨落影响的共线态.本文还讨论了这一手性序的起源和实验意义。
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 directionand the breathing bond alternation characterized by the ratio of the NN interaction for large triangles to that for small ones,, are essential. It is found by means of Monte Carlo simulations that a commensurate triple-state appearing for relatively strongat zero field is the noncoplanar state with the SkX structure in the breathing case of, while in the uniform case of, it is a collinear state favored by thermal fluctuations. The origin of this chiral order and experimental implications of our result are also discussed.
影响因子：
19.6
作者：
Heinze, Stefan;von Bergmann, Kirsten;Bluegel, Stefan
通讯作者：
Bluegel, Stefan
影响因子：
19.6
作者：
Balz, Christian;Lake, Bella;Ryll, Hanjo
通讯作者：
Ryll, Hanjo