Highly Efficient (Cs$_{8}$V) Superatom based Spin-polarizer

ORAL

Abstract

Quantum transport through molecules and the possibility to manipulate spin has generated tremendous excitement. Here, we demonstrate unusual spin transport through a molecule of two Cs$_{8}$V magnetic superatoms. Calculations based on density functional theory and non-equilibrium Green's function methods find a much higher current for the spin-down charge carriers relative to the spin-up carriers in the model Au-(Cs$_{8}$V)-(Cs$_{8}$V)-Au device system with almost 100{\%} spin polarization, indicating a highly efficient spin polarizer. The new behavior is rooted in strong coupling of the localized magnetic core on V and the itinerant electrons of the Cs shell atoms leading to nearly full spin-polarization.

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Authors

  • Shashi Karna

    US Army Research Laboratory, APG, MD

  • Haiying He

    Michigan Tech, Houghton, MI

  • Ravindra Pandey

    Michigan Tech, Houghton, MI

  • Jose Reveles

    Dept of Physics, Virginia Commonwealth University, Department of Physics, Virginia Commonwealth University, Richmond, VA 23284, USA, Virginia Commonwealth University, Richmond, VA

  • Shiv Khanna

    Dept of Physics, Virginia Commonwealth University, Dept. of Physics, Virginia Commonwealth University, Richmond, VA 23284, Department of Physics, Virginia Commonwealth University, Richmond, VA 23284, USA, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA