Non-stationary spin-dependent transport through the interacting single-level quantum dot coupled to ferromagnetic leads with non-collinear magnetizations has been 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 has been 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 results open a possibility for spin polarization control in nanoscale systems and are very promising in the sense of spin filtering.
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This work was supported by the Russian Foundation for Basic Research (project no. 20-32-70001) and by the Interdisciplinary Scientific and Educational School “Photonic and Quantum Technologies. Digital Medicine,” Moscow State University.
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Luchkin, V.N., Mantsevich, V.N. & Maslova, N.S. Non-Stationary Spin-Polarized Tunneling through a Quantum Dot Coupled to Noncollinearly Polarized Ferromagnetic Leads. Jetp Lett. 113, 681–688 (2021). https://doi.org/10.1134/S0021364021110023
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DOI: https://doi.org/10.1134/S0021364021110023