论文标题
在旋转轨道辅助Mott绝缘子Alpha-Rucl3中，由孔内电荷运动驱动的光诱导的磁化强度
Light-induced magnetization driven by interorbital charge motion in a spin-orbit assisted Mott insulator alpha-RuCl3
论文作者
论文摘要
在蜂窝晶状体旋转轨道辅助Mott绝缘子α-RUCL3中，通过低于Mott GAP的圆极化激发诱导了超快磁化。照片载体起着重要的作用，它是通过降低现场库仑相互作用的协同作用和实现绝缘体状态的自旋轨道相互作用而产生的。对光载体动力学和量子机械分析的超快6-FS测量阐明了该机制，根据该机制，磁化强度是从不同T2G轨道（RU3+离子）之间的相干电荷运动出现的。在抗铁磁（AF）相中，这种超快速磁化量削弱了，这与一般趋势相反，即AF化合物中的反向法拉第效应大于顺磁化合物的趋势。该温度依赖性表明，孔内电荷运动受AF阶段的伪自旋旋转对称性破裂的影响。
In a honeycomb-lattice spin-orbit assisted Mott insulator α-RuCl3, an ultrafast magnetization is induced by circularly polarized excitation below the Mott gap. Photo-carriers play an important role, which are generated by turning down the synergy of the on-site Coulomb interaction and the spin-orbit interaction realizing the insulator state. An ultrafast 6- fs measurement of photo-carrier dynamics and a quantum mechanical analysis clarify the mechanism, according to which the magnetization emerges from a coherent charge motion between different t2g orbitals (dyz-dxz-dxy) of Ru3+ ions. This ultrafast magnetization is weakened in the antiferromagnetic (AF) phase, which is opposite to the general tendency that the inverse Faraday effect is larger in AF compounds than in paramagnetic ones. This temperature dependence indicates that the interorbital charge motion is affected by pseudo-spin rotational symmetry breaking in the AF phase.
