Dzyaloshinskii-Moriya Interaction on the Interface of a Topological Insulator and a Magnetic Material

Datum

10.12.2018

Zeit

11:00 - 12:00

Sprecher

Marius Scholten

Zugehörigkeit

Institut für Theoretische Physik III, Ruhr-Universität Bochum

Sprache

en

Hauptthema

Materialien

Andere Themen

Materialien, Physik

Host

Grit Rötzer

Beschreibung

We investigate the interface of a hybrid heterostructure consisting of a topological insulator and a 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). .

Links

• Seminars at the IFW

Letztmalig verändert: 10.12.2018, 01:10:07