Dresden 2017 – wissenschaftliches Programm
MA 27.1: Vortrag
Dienstag, 21. März 2017, 14:00–14:15, HSZ 301
Prediction of an intrinsic spin Hall effect without spin-orbit coupling in non-collinear antiferromagnets — •Yang Zhang1,2, Jakub Zelezny1, Jeroen van den Brink2, Claudia Felser1, and Binghai Yan1,3 — 1Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — 2Leibniz Institute for Solid State and Materials Research, 01069 Dresden, Germany — 3Max Planck Institute for the Physics of Complex Systems, 01187 Dresden,Germany
The spin Hall effect (SHE), which converts a charge current into a transverse spin current, has long been believed to be a phenomenon induced by the spin-orbit coupling. In this work, we have revealed the existence of an intrinsic SHE without the spin-orbit coupling by theoretical calculations. Such a SHE is realised in the chiral spin structure of non-collinear antiferromagnets, even when the scalar spin chirality is zero. We have obtained large intrinsic spin Hall conductivity in related compounds Mn 3 Ge and Mn 3 Sn, that are chiral antiferromagnetic above room temperature and also predicted to be Weyl semimetals recently. Our work provides further understanding on the spin Hall effect and paves a new way to design SHE materials based on the chiral magnetic materials.