Browsing by Subject "Metal derivative"

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    Spin-polarized ballistic transport in a thin superlattice of zinc blende half-metallic compounds
    (The American Physical Society, 2005) Qian, M. C.; Fong, C. Y.; Pickett, W. E.; Pask, J. E.; Yang, L. H.; Dag, S.
    We examine theoretically ballistic conduction in thin layers of zinc blende half metals, considering as an example a superlattice consisting of monolayers of GaAs and MnAs, a bilayer of CrAs, and a bilayer of GaAs. By artificially separating bilayers, we show that surface states thwart half metallicity. However, capping the metal-As bilayers restores half metallicity, and ballistic conduction of electrons within ∼0.3 eV of the Fermi level will give nearly 100% spin-polarized transmission in the direction of the superlattice. Recent developments suggest atomic layer epitaxy can be used to produce such thin layers for spintronic applications.