Ballistic conductance of magnetic Co and Ni nanowires with ultrasoft pseudo-potentials

Details Ballistic conductance of magnetic Co and Ni nanowires with ultrasoft pseudo-potentials Ballistic conductance of magnetic Co and Ni nanowires with ultrasoft pseudo-potentials

2004-05-19

arxiv.org/abs/cond-mat/0405433v1

Physics

Condensed Matter

Materials Science

9 pages, 6 figures, to appear in PRB

Scientific paper

10.1103/PhysRevB.70.045417

The scattering-based approach for calculating the ballistic conductance of open quantum systems is generalized to deal with magnetic transition metals as described by ultrasoft pseudo-potentials. As an application we present quantum-mechanical conductance calculations for monatomic Co and Ni nanowires with a magnetization reversal. We find that in both Co and Ni nanowires, at the Fermi energy, the conductance of $d$ electrons is blocked by a magnetization reversal, while the $s$ states (one per spin) are perfectly transmitted. $d$ electrons have a non-vanishing transmission in a small energy window below the Fermi level. Here, transmission is larger in Ni than in Co.

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