Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 4: Topological insulators and spin-dependent transport phenomena

MA 4.14: Vortrag

Montag, 1. April 2019, 13:00–13:15, H52

Origin of anomalous Hall effect in magnetic antiperovskites — •Ilias Samathrakis, Harish Kumar Singh, and Hongbin Zhang — Theory of Magnetic Materials, TU Darmstadt, Darmstadt, Germany

Antiferromagnet materials have recently become a hot research topic for spintronic applications. Being a special class of antiferromagnets, noncollinear magnets have also attracted a lot interest. In this work, we investigated how to induce finite anomalous Hall conductivity in antiperovskite Mn₃GaN and Mn₃NiN by tuning the magnetization direction between the Γ_5g and Γ_4g configurations, as well as by applying biaxial strain. The origin of the resulting anomalous Hall conductivity is elucidated by analyzing the electronic structure in detail. It is observed that the spatial position and the energy splitting of the Weyl points give rise to the non-vanishing conductivity values.