Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 21: Magnetic textures: Transport and dynamics I
MA 21.1: Vortrag
Dienstag, 2. April 2019, 14:00–14:15, H38
Formation of skyrmions and their interplay with magnetoelectric terms at a TI/FM heterostructure — •Marius Scholten1, Ilya Eremin1, and Flavio S. Nogueira2 — 1Institut für Theoretische Physik III, Ruhr-Universität Bochum,Bochum, Germany — 2Institute for Theoretical Solid State Physics, IFW Dresden, Dresden, Germany
We investigate the interface of a hybrid heterostructure consisting of a topological insulator and ferromagnet. As has been shown recently, the interface of such a system can host skyrmions as a consequence of an emerging Dzyaloshinskii-Moriya interaction at temperatures above the Curie temperature [1]. Here, we analyze what happens in the magnetically ordered phase and in the presence of the long-range Coulomb interaction between the Dirac electrons. Due to the opening of the gap in the Dirac spectrum in the magnetically ordered phase the magnetoelectric Chern-Simons action emerges, which opens up the possibility of magnetoelectric manipulation of skyrmion structures on the interface.
[1] Flavio S. Nogueira, Ilya Eremin, Ferhat Katmis, Jagadeesh Moodera, Jeroen van den Brink, Volodymyr Kravchuk, Phys. Rev. B 98 060401(R) (2018).