2008/02/29 by Janine Splettstoesser, Michele Governale, Jürgen König · 64 citations
Physics and Astronomy · #Adiabatic process #Charge (physics) #Condensed matter physics #Coulomb #Electron #Ferromagnetism #Magnetic properties of thin films #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Spin (aerodynamics) #Spin polarization #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.77.195320
published in Physical Review B 77(19) (American Physical Society) · 9 pages, 7 figures, published in Phys. Rev. B
openalex publication_date 2008/05/22 · arxiv created 2009/05/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the adiabatic pumping of electrons through quantum dots attached to ferromagnetic leads. Hereby, we make use of a real-time diagrammatic technique in the adiabatic limit that takes the strong Coulomb interaction in the dot into account. We analyze the degree of spin polarization of electrons pumped from a ferromagnet through the dot to a nonmagnetic lead (N-dot-F) as well as the dependence of the pumped charge on the relative leads' magnetization orientations for a spin-valve (F-dot-F) structure. For the former case, we find that, depending on the relative coupling strength to the leads, spin and charge can, on average, be pumped in opposite directions. For the latter case, we find an angular dependence of the pumped charge, which becomes more and more anharmonic for large spin polarization in the leads.