论文标题
微波引起的RASHBA相互作用产生的磁化
Magnetization generated by microwave-induced Rashba interaction
论文作者
论文摘要
我们表明，如果连接处经历时间依赖性的自旋轨道相互作用，则在包含与非磁性储层的量子点中累积了可控的直流磁化。后者是由通过封闭连接的微波辐射产生的交流电场引起的。磁化是由隧道穿过连接的电子的非弹性自旋叉散射引起的，并取决于电场的极化：圆极化场导致最大效应，而在线性极化场中没有影响。此外，随着微波光子的能量变得大于量子点上的单个能级与铅中的单个能级之间的差异的绝对值，磁化强度随着阶跃函数的增加（通过温度平滑）增加。
We show that a controllable dc magnetization is accumulated in a junction comprising a quantum dot coupled to non-magnetic reservoirs if the junction is subjected to a time-dependent spin-orbit interaction. The latter is induced by an ac electric field generated by microwave irradiation of the gated junction. The magnetization is caused by inelastic spin-flip scattering of electrons that tunnel through the junction, and depends on the polarization of the electric field: a circularly polarized field leads to the maximal effect, while there is no effect in a linearly polarized field. Furthermore, the magnetization increases as a step function (smoothened by temperature) as the microwave photon energy becomes larger than the absolute value of the difference between the single energy level on the quantum dot and the common chemical potential in the leads.
