论文标题
观察莫特绝缘子Cu2oseo3中新的光引起的天空阶段
Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3
论文作者
论文摘要
我们报告了在平衡天空袋以下的磁场的多效绝缘子Cu2oseo3中发现了新型的Skyrmion阶段。可以通过激发近红外（NIR）飞秒激光脉冲的平衡样品来访问此阶段，但任何常规的场冷却方案都无法达到。从光依ro虫过程的强波长依赖性和通过自旋动力学模拟的强度，我们将磁弹性效应确定为最可能的光re依机制。这种影响导致磁相互作用的瞬时修饰，将平衡的天空袋扩展到较低的磁场。创建后，天空重新排列并长期保持稳定，到达几分钟。提出的结果与基于磁性的高效率非易失性数据存储有关。
We report the discovery of a novel skyrmion phase in the multiferroic insulator Cu2OSeO3 for magnetic fields below the equilibrium skyrmion pocket. This phase can be accessed by exciting the sample out of equilibrium with near-infrared (NIR) femtosecond laser pulses but can not be reached by any conventional field cooling protocol. From the strong wavelength dependence of the photocreation process and via spin dynamics simulations, we identify the magnetoelastic effect as the most likely photocreation mechanism. This effect results in a transient modification of the magnetic interaction extending the equilibrium skyrmion pocket to lower magnetic fields. Once created, the skyrmions rearrange and remain stable over a long time, reaching minutes. The presented results are relevant for designing high-efficiency non-volatile data storage based on magnetic skyrmions.
