Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 34: Spin Dynamics and Transport: Magnonics

MA 34.8: Vortrag

Mittwoch, 22. März 2017, 11:30–11:45, HSZ 04

Anderson Localization in antiferromagnets: comparing length and time scales to ferromagnets — •Martin Evers, Coralie Schneider, Cord A. Müller, and Ulrich Nowak — University of Konstanz, D-78457 Konstanz

As Anderson showed in 1958, in case of phase coherent transport disorder can lead to completely suppressed transport, a phenomenon known as Anderson localization [1]. For the case of spin waves this will lead to a limited propagation, even without any dissipative damping mechanism [2,3].

In the field of spin transport there is a growing interest in antiferromagnets and other materials with multiple magnetic sublattices. We investigate numerically magnonic transport with respect to Anderson localization in one and two dimensional antiferromagnets. The relevant time and length scales of weak and strong localization are compared to ferromagnets. We find clear differences, especially a much shorter localization length in antiferromagnets.

[1] P. W. Anderson, Phys. Rev. 109, 1492 (1958)
U. Ritzmann et al., Phys. Rev. B 89, 024409 (2014)
M. Evers et al., Phys. Rev. B 92, 014411 (2015)