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MA: Magnetismus

MA 13: Poster:Schichten(1-23),Spinabh.Trsp(24-41),Exch.Bias(42-56),Spindyn.(57-67),Mikromag.(68-76),Partikel(77-90),Spinelektr.(91-97),Elektr.Theo.(98-99),Mikromag+PhasÜ+Aniso.(100-105),Magn.Mat.(106-118),Messmethod.(119-121),Obflm.+Abbverf.(122-123)

MA 13.30: Poster

Dienstag, 9. März 2004, 15:00–19:00, Bereich A

Transport in nanocontacts: An ab initio description — •Michael Czerner, Alexej Bagrets, and Ingrid Mertig — Martin-Luther-University Halle-Wittenberg, Department of Physics, Von-Seckendorff-Platz 1, 06120 Halle, Germany

We present ab-initio calculations of the transport properties of metallic atomic-sized nanocontacts. The nanocontacts were modelled by atomic chains of Cu and Co suspended between two semi-infinite leads. We used the first principle screened Korringa-Kohn-Rostoker method to calculate the electronic properties of the systems, treating the leads and atomic chains on the same footing without any model parameters. The Landauer formalism was applied to investigate the conductance. Quantum size effects and the influence of impurity scattering is discussed in detail.