Electronic and transport properties of a short Ni nanowire suspended between two semi-infinite ferromagnetic Ni leads are explored in the framework of density-functional theory. The spin-dependent ballistic conductance of the nanowire is calculated using a scattering-based approach and the Landauer-Buttiker formula. The total calculated conductance in units of G(0)=2e(2)/h is around 1.6, in fairly good agreement with the broad peak observed around similar to 1.5 for the last conductance step in the break junctions. Separating contributions from different spins, we find nearly 0.5G(0) from the majority spin s-like channel, whereas the remaining minority spin conductance of 1.1G(0) contains significant contributions from several d states, but much less than 0.5G(0) from s states. The influence of the structural relaxation on the magnetic properties and the ballistic conductance of the nanowire is also studied.

Ballistic conductance and magnetism in short tip suspended Ni nanowires / Smogunov, A; Dal Corso, Andrea; Tosatti, Erio. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 73:7(2006). [10.1103/PhysRevB.73.075418]

Ballistic conductance and magnetism in short tip suspended Ni nanowires

Dal Corso, Andrea;Tosatti, Erio
2006-01-01

Abstract

Electronic and transport properties of a short Ni nanowire suspended between two semi-infinite ferromagnetic Ni leads are explored in the framework of density-functional theory. The spin-dependent ballistic conductance of the nanowire is calculated using a scattering-based approach and the Landauer-Buttiker formula. The total calculated conductance in units of G(0)=2e(2)/h is around 1.6, in fairly good agreement with the broad peak observed around similar to 1.5 for the last conductance step in the break junctions. Separating contributions from different spins, we find nearly 0.5G(0) from the majority spin s-like channel, whereas the remaining minority spin conductance of 1.1G(0) contains significant contributions from several d states, but much less than 0.5G(0) from s states. The influence of the structural relaxation on the magnetic properties and the ballistic conductance of the nanowire is also studied.
2006
73
7
075418
http://link.aps.org/doi/10.1103/PhysRevB.73.075418
Smogunov, A; Dal Corso, Andrea; Tosatti, Erio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/13597
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