论文标题
通过THZ声子抽水到磁铁中最小耗散开关的途径
A route to minimally dissipative switching in magnets via THz phonon pumping
论文作者
论文摘要
先进的磁性记录范例通常使用较大的温度变化来驱动对设备寿命有害的开关，因此发现非热路线对于将来的应用至关重要。通过采用原子自旋晶格动力学模拟，我们显示出由THZ声子激发触发的有效相干磁化开关在绝缘单个物种材料中。关键成分是在通常无法激发旋转的条件下以及歧管$ k $ phonon模式下的频谱的$ p $点附近的激发。我们的模型预测了低触发性切换的必要成分，并为THZ激发的旋转动力学提供了新的见解。
Advanced magnetic recording paradigms typically use large temperature changes to drive switching which is detrimental to device longevity, hence finding non-thermal routes is crucial for future applications. By employing atomistic spin-lattice dynamics simulations, we show efficient coherent magnetisation switching triggered by THz phonon excitation in insulating single species materials. The key ingredient is excitation near the $P$-point of the spectrum in conditions where spins typically cannot be excited and when manifold $k$ phonon modes are accessible at the same frequency. Our model predicts the necessary ingredients for low-dissipative switching and provides new insight into THz-excited spin dynamics.
