论文标题
超快自旋热量膦中的Stratonovich-Ito集成方案
Stratonovich-Ito integration scheme in ultrafast spin caloritronics
论文作者
论文摘要
Magnonic Spin Seebeck效果是自旋热量的关键元素，该领域利用了Spintronic应用的热效应。早期研究的重点是研究稳态的非平衡宏伟旋转塞贝克电流，而宏伟的旋转seebeck效应的基本物理现在已经相对良好。但是，旋转Seebeck电流形成的初始步骤符合最近感兴趣的范围。从理论上讲，我们在这里提出了一种新方法来解决时间分辨的旋转Seebeck效应。我们的方法利用了随机和ITO -Stratonovich整合方案的超对称理论。我们发现，在早期，旋转塞贝克电流具有非零的横向和纵向成分。当磁化动力学接近稳态时，横向组件通过将偶极偶极储存液脱落而衰减。该过程的时间尺度通常位于子纳秒中，从而指出了对动态自旋塞贝克在堆积过程中的超快控制的潜力。
The magnonic spin Seebeck effect is a key element of spin caloritronic, a field that exploits thermal effects for spintronic applications. Early studies were focused on investigating the steady-state nonequilibrium magnonic spin Seebeck current, and the underlying physics of the magnonic spin Seebeck effect is now relatively well established. However, the initial steps of the formation of the spin Seebeck current are in the scope of recent interest. To address this dynamical aspect theoretically we propose here a new approach to the time-resolved spin Seebeck effect. Our method exploits the supersymmetric theory of stochastics and Ito - Stratonovich integration scheme. We found that in the early step the spin Seebeck current has both nonzero transversal and longitudinal components. As the magnetization dynamics approaches the steady-state, the transversal components decay through dephasing over the dipole-dipole reservoir. The time scale for this process is typically in the sub-nanoseconds pointing thus to the potential of an ultrafast control of the dynamical spin Seebeck during its buildup.
