Regensburg 2019 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 16: Multiferroics and Magnetoelectric coupling II (joint session MA/KFM)

KFM 16.3: Vortrag

Freitag, 5. April 2019, 10:00–10:15, H39

Magnetoelectric Polarizability in Magnetic Insulators — •Maximilian Merte^1,2, Frank Freimuth¹, Stefan Blügel¹, and Yuriy Mokrousov^1,2 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — ²Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

In the field of spintronics, the interaction of insulators with external electromagnetic fields plays a crucial role for future prospects related to fundamental understanding and technological applications of magnetic oxides. In a situation of reduced symmetries, magnetic insulators can exhibit a finite electric polarization. Recently, a semiclassical approach describing the positional shift of Bloch electrons due to interband mixing induced by an external electromagnetic field was proposed [1]. These shifts can be computed via response matrices, which are constructed from interband velocity elements and band energies. Here we want to report on the implementation of this approach by means of Wannier interpolation, which can be applied as a postprocessing step to first-principles calculations performed with the Jülich DFT code FLEUR [2], an implementation of the FLAPW method. We apply the developed method to the study of magnetoelectric polarizability to selected magnetic insulators.

[1] Qian Niu et al., Phys. Rev. Lett. 112, 166601 (2014).
www.flapw.de .