27. 2. 2019

Libor Šmejkal (FZÚ AVČR Praha):
Topological antiferromagnetic spintronics


Abstract:

We will introduce the main experimental and theoretical discoveries shaping
the fields of spintronics and topological phases of matter. As a central
topic, we will analyse crystal symmetries of antiferromagnets [1] allowing for
the novel emergent topological spintronics effects [2]. As two main examples,
we will focus on Dirac antiferromagnets with relativistic metal-insulator
transition [3], and crystal Hall collinear antiferromagnets surprisingly
hosting spontaneous Hall currents [4].

Finally, we will outline envisaged applications in topological transistor
devices or axion particle detectors [5].

[1] L. Šmejkal and T. Jungwirth, Chapter 9, Topology in Magnetism, Springer International Publishing (2018)
[2] Libor Šmejkal, Yuriy Mokrousov, Binghai Yan & Allan H. MacDonald,  Nature Phys. 14 (2018)
[3] L. Šmejkal, J. Železný, J. Sinova, T. Jungwirth, Phys. Rev. Lett. 118 (2017)
[4] Libor Šmejkal, Rafael González-Hernández, Tomáš Jungwirth, Jairo Sinova, arXiv:1901.00445 (2019)
[5] David J. E. Marsh,Kin Chung Fong, Erik W. Lentz, Libor Šmejkal, Mazhar N. Ali, arXiv:1807.08810v1 (2018)