Department of Earth and Space Science, Faculty of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Phys Rev Lett. 2012 Jan 6;108(1):017206. doi: 10.1103/PhysRevLett.108.017206. Epub 2012 Jan 5.
Ordering of the frustrated classical Heisenberg model on the triangular lattice with an incommensurate spiral structure is studied under magnetic fields by means of a mean-field analysis and a Monte Carlo simulation. Several types of multiple-q states including the Skyrmion-lattice state is observed in addition to the standard single-q state. In contrast to the Dzyaloshinskii-Moriya interaction driven system, the present model allows both Skyrmions and anti-Skyrmions, together with a new thermodynamic phase where Skyrmion and anti-Skyrmion lattices form a domain state.
通过平均场分析和蒙特卡罗模拟研究了具有非简并螺旋结构的三角形晶格上受挫经典海森堡模型在磁场中的排序。除了标准的单量子态外，还观察到了几种多量子态，包括Skyrmion 晶格态。与 Dzyaloshinskii-Moriya 相互作用驱动的系统不同，本模型允许 Skyrmions 和反 Skyrmions 同时存在，以及一个新的热力学相，其中 Skyrmion 和反 Skyrmion 晶格形成一个畴态。
