Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 36: Topological insulators and Weyl semimetals (joint session MA/TT)

MA 36.4: Vortrag

Mittwoch, 14. März 2018, 15:45–16:00, EB 407

Edelstein effect in Weyl semimetals — •Annika Johansson^1,2, Jürgen Henk², and Ingrid Mertig^2,1 — ¹Max Planck Institute of Microstructure Physics, Halle, Germany — ²Martin Luther University Halle-Wittenberg, Halle, Germany

Using semiclassical Boltzmann transport theory, we predict a current-induced spin polarization in Weyl semimetals, similar to the Edelstein effect of surface states in Rashba systems or in topological insulators [1]. The theory is applied to the Weyl semimetal TaAs simulated by an effective two-band model [2,3], for which we estimate the magnitude of the effect. The main contribution comes from the topological surface states, i. e. the Fermi arcs, which provide an enormous current-induced spin polarization.

[1] V. M. Edelstein, Solid State Commun., 73, 233 (1990) [2] S. Murakami and S.-i. Kuga, Phys. Rev. B 78, 165313 (2008) [3] R. Okugawa and S. Murakami, Phys. Rev. B 89, 235315 (2014)