论文标题
纳米磁/石墨烯混合系统中的自旋掺杂通过旋转掺杂进行极化扩增
Polarization amplification by spin-doping in nanomagnetic/graphene hybrid systems
论文作者
论文摘要
在许多量子设备中，非平衡电子自旋极化，自旋传输和自旋检测的产生至关重要。我们证明，磁性纳米植物的晶格通过载体交换增强了单层石墨烯中的电子自旋极化。我们通过电子自旋共振（ESR）的电阻检测变体探测了自旋极化，并观察到由纳米模特的存在介导的共振扩增。每种纳米局部局部向石墨烯中注入了自旋极化载体的盈余，所有“自旋热点”的合奏在宏观长度的石墨烯层中生成非平衡电子自旋极化。每当间点距离比自旋扩散长度相当或小时，就会发生这种情况。
The generation of non-equilibrium electron spin polarization, spin transport, and spin detection are fundamental in many quantum devices. We demonstrate that a lattice of magnetic nanodots enhances the electron spin polarization in monolayer graphene via carrier exchange. We probed the spin polarization through a resistively-detected variant of electron spin resonance (ESR) and observed resonance amplification mediated by the presence of the nanodots. Each nanodot locally injects a surplus of spin-polarized carriers into the graphene, and the ensemble of all "spin hot spots" generates a non-equilibrium electron spin polarization in the graphene layer at macroscopic lengths. This occurs whenever the interdot distance is comparable or smaller than the spin diffusion length.
