论文标题
木腐腐烂对参数泵送木蛋白的影响
Effect of magnon decays on parametrically pumped magnons
论文作者
论文摘要
我们研究了磁性激发元素在磁性绝缘体YTTRIUM-IROIN石榴石（YIG）中的镁衰变对参数激发木元的非平衡动力学的影响。 Noack等人最近的实验激发了我们的调查。 [物理。状态固体B 256，1900121（2019）]，其中在磁场强度附近观察到YIG中自旋泵浦效应的增强，在该磁场强度附近，通过镁融合的镁腐烂，可以在运动场上衰减。为了解释实验发现，我们为非平衡镁分布提供了动力学方程。通过涉及三个磁杆操作员的相互作用顶点得出的碰撞积分来考虑镁衰减的效果。我们的结果与实验数据定量一致。
We investigate the influence of magnon decays on the non-equilibrium dynamics of parametrically excited magnons in the magnetic insulator yttrium-iron garnet (YIG). Our investigations are motivated by a recent experiment by Noack et al. [Phys. Status Solidi B 256, 1900121 (2019)] where an enhancement of the spin pumping effect in YIG was observed near the magnetic field strength where magnon decays via confluence of magnons becomes kinematically possible. To explain the experimental findings, we have derived and solved kinetic equations for the non-equilibrium magnon distribution. The effect of magnon decays is taken into account microscopically via collision integrals derived from interaction vertices involving three powers of magnon operators. Our results agree quantitatively with the experimental data.
