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Abstract:
Our study highlights spin-polarization mechanisms in metals by focusing
on the mobilities of conducting electrons with different spins instead
of their quantities. Here, we engineer electron mobility by applying
chemical disorder induced by nonstoichiometric variations. As a
practical example, we discuss the scheme that establishes such
variations in tetragonal Mn3Ga Heusler material. We justify this
approach using first-principles calculations of the spin-projected
conductivity components based on the Kubo-Greenwood formalism. It
follows that, in the majority of cases, even a small substitution of
some other transition element instead of Mn may lead to a substantial
increase in spin polarization along the tetragonal axis.
