论文标题
在各向异性三角晶格哈伯德模型中的光引起的磁顺序转换
Light-induced switching of magnetic order in the anisotropic triangular-lattice Hubbard model
论文作者
论文摘要
时间依赖性的精确 - 划分方法用于研究各向异性三角晶格哈伯德模型中磁性的光诱导的相变。计算自旋相关函数，我们确认从120 $^{\ circ} $订单到néel订单的相变，可以由于高频周期性字段而进行。我们表明，浮力理论从高频扩展中得出的有效Heisenberg-Model Hamiltonian很好地描述了当前系统，并且以外部场的频率和幅度表示的交换相互作用的比率决定了磁性阶的类型。我们的结果通过调整外场来证明磁性订单的可控性。
The time-dependent exact-diagonalization method is used to study the light-induced phase transition of magnetic orders in the anisotropic triangular-lattice Hubbard model. Calculating the spin correlation function, we confirm that the phase transition from the 120$^{\circ}$ order to the Néel order can take place due to high-frequency periodic fields. We show that the effective Heisenberg-model Hamiltonian derived from the high-frequency expansion by the Floquet theory describes the present system very well and that the ratio of the exchange interactions expressed in terms of the frequency and amplitude of the external field determines the type of the magnetic orders. Our results demonstrate the controllability of the magnetic orders by tuning the external field.
