论文标题
直接和交替的镁旋转电流跨通过线性极化激光照射的连接接口
Direct and alternating magnon spin currents across a junction interface irradiated by linearly polarized laser
论文作者
论文摘要
量子光学领域的发展提高了人们对激光耦合的期望，是镁化的有前途的基础。在这里，我们提出了一种通过线性极化激光照射的连接接口的直接和交替自旋电流的方法。在具有较大电子间隙的铁磁绝缘子的连接中，在跨界界面的木元素的隧道过程中，旋转角动量被交换。血浆和超材料领域的先进技术意识到，激光场辐照的旋转仅通过Zeeman耦合与激光的磁成分相互作用。使用分析性扰动理论，我们为跨连接界面的反转对称性破裂引起的磁通传输提供了通用公式。然后，我们表明这些自旋电流通过铁磁共振增强，并且AC旋转电流的周期是激光磁场的一半。最后，我们估计自旋电流的大小，并发现它将在实验范围内。
The developments in the field of quantum optics raise expectations that laser-matter coupling is a promising building block for magnonics. Here, we propose a method for the generation of direct and alternating spin currents of magnons across the junction interface irradiated by linearly polarized laser. In a junction of ferromagnetic insulators with a large electronic gap, the spin angular momentum is exchanged during the tunneling process of magnons across the junction interface. The advanced technology in the field of plasmonics and metamaterials realizes that spins irradiated by the laser field interact only with the magnetic component of the laser through the Zeeman coupling. Using an analytic perturbation theory, we provide a general formula for magnon transport induced by the inversion symmetry breaking across the junction interface. Then, we show that those spin currents are enhanced by the ferromagnetic resonance, and the period of the ac spin current is one-half of that of the laser magnetic field. Finally, we estimate the magnitude of the spin current, and find that it will be within experimental reach.
