基于非平衡格林函数铁磁-量子点系统的散粒噪声

Shot Noise Based on Non-equilibrium Green Function in Ferromagnetic-quantum Dot System

借助Anderson模型的哈密顿量,利用格林函数和运动方程,研究了铁磁电极的量子点系统的极化输运特性。结果表明:通过调节微波外场、铁磁电极的磁矩相对取向与温度等,均能实现控制体系中自旋极化电流的目的,达到自旋阀效应,为研究新的自旋电子材料提供了理论依据。

Based on the Anderson model,spin-polarized transport characteristics in the quantum dot sys-tem of ferromagnetic leads are investigated by using Green function and motion equation.Results show that the microwave filed and the relative orientation of magnetic moment in the ferromagnetic leads as well as the temperature are all the important parameters to control spin-polarized current in the quantum dot system and generate a spin-valve effect,which will provide theoretical basis for study on the new material of spinning electron.