Perfect Spin Filter by Periodic Drive of a Ferromagnetic Quantum Barrier.

  title={Perfect Spin Filter by Periodic Drive of a Ferromagnetic Quantum Barrier.},
  author={Daniel Thuberg and Enrique Mu{\~n}oz and Sebastian Eggert and Sebasti{\'a}n Reyes},
  journal={Physical review letters},
  volume={119 26},
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 a 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… 

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