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Perfect spin filter by periodic drive of a ferromagnetic quantum barrier
- Source :
- Phys. Rev. Lett. 119, 267701 (2017)
- Publication Year :
- 2017
-
Abstract
- We consider the problem of particle tunneling through a periodically driven ferromagnetic quantum barrier connected to two leads. The barrier is modeled by an impurity site representing a ferromagnetic layer or quantum dot in a tight-binding Hamiltonian with a local magnetic field and an AC-driven potential, which is solved using the Floquet formalism. The repulsive interactions in the quantum barrier are also taken into account. Our results show that the time-periodic potential causes sharp resonances of perfect transmission and reflection, which can be tuned by the frequency, the driving strength, and the magnetic field. We demonstrate that a device based on this configuration could act as a highly-tunable spin valve for spintronic applications.<br />Comment: 6 pages, 4 figures, for more information and the latest version see https://www.physik.uni-kl.de/eggert/papers/index.html
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 119, 267701 (2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1708.00004
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.119.267701