Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 49: Spin-dependent Transport/ Spin Torque
MA 49.1: Vortrag
Donnerstag, 17. März 2011, 10:45–11:00, HSZ 04
Correlating transmission and local electronic structure in planar junctions: An analysis tool for spin-dependent transport calculations — •Peter Bose1, Peter Zahn2, Ingrid Mertig1, 2, and Jürgen Henk1 — 1Max Planck Institute of Microstructure Physics, Halle, Germany — 2Martin Luther University Halle-Wittenberg, Halle, Germany
Calculations of spin-dependent transport in planar tunnel junctions are typically analyzed by means of transmission and spectral-density maps that display the transmittance or spectral densities in the two-dimensional Brillouin zone at a fixed energy. A visual inspection of these maps in order to reveal, e. g., which layers or which orbitals determine the conductance is not only tedious but also ambiguous.
We propose to analyze spin-dependent transport calculations quantitatively and without ambiguity by correlating transmission and spectral-density maps. Since spectral-density maps can be resolved with respect to atom, angular momentum, and spin, the resulting correlation coefficients reveal unequivocally detailed features of the conductances. Salient properties of our method are discussed for selected planar junctions.