Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 79: Correlated Electrons - Poster Session

TT 79.49: Poster

Mittwoch, 2. April 2014, 15:00–19:00, P2

Magnetocrystalline anisotropy in low dimensional systems — •Kira Riedl, Harald O. Jeschke, and Roser Valenti — Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany

We study the magnetic and electronic properties of low dimensional systems with focus on consequences of spin-orbit coupling. On the basis of density functional theory (DFT) calculations we analyze several materials regarding if effects of the magnetocrystalline anisotropy or the Dzyaloshinskii-Moriya interaction can be observed. We investigate recent reports of a significant magnetic anisotropy in the copper compound CuBr₂ and the pyrochlore R₂V₂O₇ with DFT+U+SOC calculations. As a member of another class of materials with dominant effects of spin-orbit coupling we also study the magnetic properties of the hexagonal iridate Na₂IrO₃. It is of high physical interest since there is no general agreement yet whether it is a realization of the Heisenberg-Kitaev model or it can rather be described with quasi-molecular orbitals.