论文标题
超快旋转动力学和光诱导的绝缘体到金属过渡，$α$ - $ rucl_3 $
Ultrafast Spin Dynamics and Photoinduced Insulator-to-Metal Transition in $α$-$RuCl_3$
论文作者
论文摘要
激光诱导的超快消灭是最引起人们最大兴趣的现象，并引起了极大的关注，因为它可以在超快光电子和旋转型中进行潜在应用。作为自旋轨道耦合辅助磁绝缘子，$α$ -RUCL_3 $提供了一个有吸引力的平台，用于探索电子相关性物理和相关的非常规磁性。使用时间依赖性密度函数理论，我们探索了$α$ -RUCL_3 $中的超快激光诱导的电子和磁性结构的动力学。我们的研究揭示了激光脉冲可以在$α$ -RUCL_3 $中引入超快速反应，并伴随着几十秒的空位中的超平衡绝缘体到金属过渡。自旋响应显着取决于激光波长和由于电子相关性，带状率化和电荷重新分布而产生的极化。这些发现提供了对$α$ - $ rucl_3 $的电子自由度和磁性自由度之间的耦合的物理见解，并在抑制远程磁性订单并在超级速度时间表上达到二维磁铁的近距离旋转液相时就浮出水面。
Laser-induced ultrafast demagnetization is a phenomenon of utmost interest and attracts significant attention because it enables potential applications in ultrafast optoelectronics and spintronics. As a spin-orbit coupling assisted magnetic insulator, $α$-$RuCl_3$ provides an attractive platform to explore the physics of electronic correlations and related unconventional magnetism. Using time-dependent density functional theory, we explore the ultrafast laser-induced dynamics of the electronic and magnetic structures in $α$-$RuCl_3$. Our study unveils that laser pulses can introduce ultrafast demagnetizations in $α$-$RuCl_3$, accompanied by an out-of-equilibrium insulator-to-metal transition in a few tens of femtoseconds. The spin response significantly depends on the laser wavelength and polarization on account of the electron correlations, band renormalizations and charge redistributions. These findings provide physical insights into the coupling between the electronic and magnetic degrees of freedom in $α$-$RuCl_3$ and shed light on suppressing the long-range magnetic orders and reaching a proximate spin liquid phase for two-dimensional magnets on an ultrafast timescale.
