Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 10: Poster Session: Topological Topics (joint session TT/MA)

MA 10.5: Poster

Montag, 1. April 2019, 15:00–18:30, Poster D

Surface currents in Weyl semimetal nanowires — •Patrick Grössing, Daniel Hernangómez-Pérez, and Ferdinand Evers — Institute of Theoretical Physics, Regensburg University, D-93053 Regensburg (Germany)

We investigate the transport properties of thin wires made of a Weyl semimetal within the framework of a tight-binding model. Our focus is on bias induced surface currents in materials where time-reversal symmetry is broken because of magnetisation [1, 2]. Depending on the crystallographic growth direction, the current flow exhibits different patterns; in particular, large transverse (wrapping) currents can be observed. We perform a careful finite size analysis that reveals,. e. g., the interplay between quantum size effects and the Fermi arcs, which are a hallmark of the topological nature of the material [3, 4].
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