论文标题
微波逃生场的非接触式旋转泵
Non-Contact Spin Pumping by Microwave Evanescent Fields
论文作者
论文摘要
已经在纳米透镜和血浆中研究了淡淡的光场的角动量，但在微波处理方面没有研究。在这里，我们预测通过激发磁性纳米结构的evaneScent流浪场在导体中对电子自旋电流的非接触式泵送。光子向电子旋转的相干传递与$ g $ factor成正比，该因子在狭窄的差距半导体和拓扑绝缘子的表面状态中很大。当自旋敏感性显示出表明集体状态的奇异性时，自旋泵送电流是手性的。但是，在费米能量（例如金属碳纳米管）上具有线性分散的1D系统是一个例外，因为即使没有相互作用，自旋泵送也是手性。
The angular momentum of evanescent light fields has been studied in nano-optics and plasmonics, but not in the microwave regime. Here we predict non-contact pumping of electron spin currents in conductors by the evanescent stray fields of excited magnetic nanostructures. The coherent transfer of the photon to the electron spin is proportional to the $g$-factor, which is large in narrow-gap semiconductors and surface states of topological insulators. The spin pumping current is chiral when the spin susceptibility displays singularities that indicate collective states. However, 1D systems with linear dispersion at the Fermi energy such as metallic carbon nanotubes are an exception since spin pumping is chiral even without interactions.
