Non-stationary spin-dependent transport through the interacting single-level quantum dot coupled to ferromagnetic leads with non-collinear magnetizations was analyzed theoretically. The non- stationary transport is investigated within the theoretical approach based on kinetic equations for the electron occupation numbers with different spins taking into account high order correlation functions for the localized electrons. It was demonstrated that spin polarization, direction and amplitude of the non-stationary currents could be effectively changed in a rather simple system by varying the relative directions of the magnetic moments in the leads. The degree of the currents spin polarization also changes following the direction of magnetic moments in the leads. The obtained results open a possibility for spin polarization control in nanoscale systems and are very promising in the sense of spin filtering.

从理论上分析了通过耦合到具有非共线磁化强度的铁磁引线的相互作用的单能级量子点的非平稳自旋依赖性输运。考虑到局部电子的高阶相关函数，在理论方法的基础上，基于具有不同自旋的电子占有数的动力学方程，对非平稳输运进行了研究。结果表明，通过改变导线中磁矩的相对方向，可以在一个相当简单的系统中有效地改变非平稳电流的自旋极化，方向和幅度。电流自旋极化的程度也随导线中磁矩的方向而变化。