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  • Title: A Minimal tight-binding model for ferromagnetic canted bilayer manganites.
    Author: Baublitz M, Lane C, Lin H, Hafiz H, Markiewicz RS, Barbiellini B, Sun Z, Dessau DS, Bansil A.
    Journal: Sci Rep; 2014 Dec 19; 4():7512. PubMed ID: 25522737.
    Abstract:
    Half-metallicity in materials has been a subject of extensive research due to its potential for applications in spintronics. Ferromagnetic manganites have been seen as a good candidate, and aside from a small minority-spin pocket observed in La(2-2x)Sr(1+2x)Mn(2)O(7) (x = 0.38), transport measurements show that ferromagnetic manganites essentially behave like half metals. Here we develop robust tight-binding models to describe the electronic band structure of the majority as well as minority spin states of ferromagnetic, spin-canted antiferromagnetic, and fully antiferromagnetic bilayer manganites. Both the bilayer coupling between the MnO2 planes and the mixing of the |x(2) - y(2) > and |3 z(2) - r(2) > Mn 3d orbitals play an important role in the subtle behavior of the bilayer splitting. Effects of kz dispersion are included.
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