中心对称磁体中手性相互作用对双斯格明子的稳定作用
Stabilization of Biskyrmions by chiral interaction in centrosymmetric magnets
AI总结：
本文提出在三角晶格最小经典自旋模型中，由外磁场诱导的手性磁相互作用能在临界值以上稳定双斯格明子态并影响其尺寸，揭示了中心对称磁体中稳定双斯格明子的微观机制。
摘要：
我们通过研究一个在三角晶格上包含最近邻铁磁Heisenberg交换和静态手性磁相互作用的最小经典自旋晶格模型，报道了自然界中稳定双斯格明子的微观机制。该模型的物理动机源自破坏时间反演对称性的Mott绝缘体，即存在外加磁场时二维晶格上半填充的单带Hubbard模型的大$U$极限。在$1/U^{2}$阶，外磁场可诱导三个相邻自旋间的手性相互作用。我们证明手性磁相互作用在临界值以上会产生双斯格明子态，且其强度会影响所形成双斯格明子的尺寸。
英文摘要：
We report a microscopic mechanism for stabilization of biskyrmions in nature by investigating a minimal classical spin lattice model with nearest neighbour ferromagnetic Heisenberg exchange and static chiral magnetic interaction on the triangular lattice. The model is physically motivated model from the Mott insulators with broken time-reversal symmetry, that is, in the large-$U$ limit of the one band Hubbard model at half-filling on a two-dimensional lattice in the presence of external magnetic field. At order $1/U^{2}$, the external magnetic field can induce a chiral interaction between the three neighbouring spins. We demonstrate that the chiral magnetic interaction results in biskyrmion states above a critical value and its strength affects the size of biskyrmions forming.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
