论文标题
基于石墨烯的自旋流动器中自旋电流的载体漂移控制
Carrier Drift Control of Spin Currents in Graphene-Based Spin-Current Demultiplexers
论文作者
论文摘要
自旋传输的电控制有望实现新的设备功能。在这里，我们计算出在漂移电流的效果下，基于石墨烯的自旋流媒体反复弹膜中自旋电流的传播。我们表明，使用在实验中已经获得的自旋和电荷传输参数，可以以受控的方式指导自旋电流。特别是，在中等漂移电流密度为20μa/μm的情况下，可以在10μm的距离内实现自旋流动性的选择，这意味着臂中关闭的旋转电流仅是臂中臂中电流的1％。为了说明这种方法的多功能性，我们在具有四个输出的设备中显示出相似的效率，并且使用自旋漂移进行多路复用器操作的可能性。最后，我们解释了如何在石墨烯和二维半导体中优化效果。
Electrical control of spin transport is promising for achieving new device functionalities. Here we calculate the propagation of spin currents in a graphene-based spin-current demultiplexer under the effect of drift currents. We show that, using spin- and charge-transport parameters already obtained in experiments, the spin currents can be guided in a controlled way. In particular, spin-current selectivities up to 102 can be achieved for measurements over a distance of 10μm under a moderate drift current density of 20μA/μm, meaning that the spin current in the arm that is off is only 1% of the current in the arm that is on. To illustrate the versatility of this approach, we show similar efficiencies in a device with four outputs and the possibility of multiplexer operation using spin drift. Finally, we explain how the effect can be optimized in graphene and two-dimensional semiconductors.
