论文标题
拓扑铁磁蜂窝状晶格中的非线性局部激发
Nonlinear localized excitations in a topological ferromagnetic honeycomb lattice
论文作者
论文摘要
从理论上讲，我们在Heisenberg Honeycomb Ferromagnet中研究了与第二个邻居Dzialozinskii-Moriya相互作用中的非线性局部激发，这已被证明具有拓扑结构。使用时间依赖性的变分原理，我们获得了Glauber相干状态表示中系统运动方程。通过半分化的多尺度方法，获得了不同类型的非线性局部激发。我们的结果表明，Heisenberg Honeycomb Ferromagnet中可能出现二维离散呼吸器和散装间隙孤子。
We theoretically investigate nonlinear localized excitations in a Heisenberg honeycomb ferromagnet with a second neighbour Dzialozinskii-Moriya interaction, which has been proved to possess the topological band structure. Using the time-dependent variational principle, we obtain the equation of motion for the system in the Glauber coherent-state representation. By means of the semidiscrete multiple-scale method, different types of nonlinear localized excitations are gotten.Our results show that both two-dimensional discrete breathers and bulk gap solitons may occur in the Heisenberg honeycomb ferromagnet.
