Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Electron Theory of Magnetism

MA 51.9: Vortrag

Freitag, 4. April 2014, 11:30–11:45, HSZ 401

Fast algorithm for conductance of layered systems — •Vaclav Drchal¹, Josef Kudrnovsky¹, and Ilja Turek² — ¹Inst. of Physics, Acad. Sci., Praha, Czech Republic — ²Inst. of Physics of Materials, Brno, Czech Republic

We developed a highly efficient method to calculate the conductance of disordered multilayer systems that can be represented by lateral supercells with random occupation of lattice sites by atoms. Stacking of supercells in the growth direction is arbitrary. The method employs the surface Green functions and it is of O(L) type, where L is the number of layers. For large L the conductance behaves as C(L) = σ L, where σ is a longitudinal conductivity. The method is illustrated on disordered magnetic alloys and on a graphene sheet with adsorbed magnetic atoms.