Spin polarization of the Fermi arcs in the Weyl semimetal TaAs
ORAL
Abstract
In a Weyl semimetal, Weyl fermion quasiparticle excitations correspond to points of bulk band degeneracy separated in $k-$space and connected on the surface by Fermi arcs. Our spin-resolved ARPES measurements on the experimentally discovered Weyl semimetal TaAs have revealed that the Fermi arcs have spin polarization larger than 80{\%} and that the spin texture is in-plane and does not match with that of the bulk Weyl cones where they meet.
*The work at Princeton and Princeton-led ARPES measurements were supported by the Gordon and Betty Moore Foundations EPiQS Initiative through grant GBMF4547 (Hasan) and by U.S. Department of Energy DE-FG-02-05ER46200.
