Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 51: Electron Theory of Magnetism
MA 51.10: Vortrag
Freitag, 4. April 2014, 11:45–12:00, HSZ 401
The Fermi-sea term in relativistic LMTO transport theory for random alloys — •Ilja Turek1, Josef Kudrnovsky2, and Vaclav Drchal2 — 1Institute of Physics of Materials, Acad. Sci. Czech Rep., Brno, Czech Republic — 2Institute of Physics, Acad. Sci. Czech Rep., Prague, Czech Republic
We present formulation of the so-called Fermi-sea contribution to the conductivity tensor of spin-polarized random alloys within the fully relativistic tight-binding LMTO method and the coherent potential approximation (CPA). We show that the configuration averaging of this contribution is surprisingly simple, since it leads to the CPA-vertex corrections that are solely due to the energy dependence of the average single-particle propagators. Moreover, we prove that the Fermi-sea term is indispensable for the invariance of the anomalous Hall conductivities with respect to the particular LMTO representation used in numerical implementation. The calculations for ferromagnetic 3d metals (Fe, Co, Ni) and their selected random binary alloys will be presented and their results will be compared with the previous study [1] based only on the Fermi-surface contribution. [1] I. Turek et al., Phys. Rev. B 86, 014405 (2012).