Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 10: Focus Session "Topological Transport in Systems with broken Time Inversion Symmetry", Organization: Stefan Blügel (FZ Jülich)

MA 10.2: Topical Talk

Montag, 26. März 2012, 15:30–16:00, H 1012

Engineering topological transport via control of the spin-orbit interaction — •Yuriy Mokrousov — Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Germany

The spin-orbit interaction (SOI) in a crystal plays a central role in various phenomena ranging from spin-relaxation in metals to the emergence of non-trivial topological phases in insulators. Here, we analyze how the origin of SOI, its spin-conserving and spin-non-conserving nature, as well as its interplay with impurity scattering can affect the topological transport properties in metals and insulators. In particular we focus on the case of the anomalous Hall effect in metallic ferromagnets [1, 2] and quantum anomalous Hall effect in two-dimensional topological insulators [3], suggesting how via control of the SOI non-trivial topological states can be stabilized, and their experimental observation made simpler.

[1] H. Zhang, F. Freimuth, S. Blügel, Y. Mokrousov and I. Souza, Phys. Rev. Lett. 106, 117202 (2011)

[2] J. Weischenberg, F. Freimuth, J. Sinova, S. Blügel and Y. Mokrousov, Phys. Rev. Lett. 107, 106601 (2011)

[3] H. Zhang, C. Lazo, S. Blügel, S. Heinze and Y. Mokrousov, arXiv:1108.5915v1 (2011)