Spin-polarized current in noncollinear antiferromagnets

0484643 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Železný, Jakub - Zhang, Y. - Felser, C. - Yan, B.
Spin-polarized current in noncollinear antiferromagnets.
Physical Review Letters. Roč. 119, č. 18 (2017), s. 1-7, č. článku 187204. ISSN 0031-9007. E-ISSN 1079-7114
Institucionální podpora: RVO:68378271
Klíčová slova: anisotropic magnetoresistance * wannier functions * room-temperature * torques * spintronics
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 8.839, rok: 2017

Noncollinear antiferromagnets, such as Mn-3 Sn and Mn-3 Ir, were recently shown to be analogous to ferromagnets in that they have a large anomalous Hall effect. Here we show that these materials are similar to ferromagnets in another aspect: the charge current in these materials is spin polarized. In addition, we show that the same mechanism that leads to the spin-polarized current also leads to a transverse spin current, which has a distinct symmetry and origin from the conventional spin Hall effect. We illustrate the existence of the spin-polarized current and the transverse spin current by performing ab initio microscopic calculations and by analyzing the symmetry. We discuss possible applications of these novel spin currents, such as an antiferromagnetic metallic or tunneling junction.
Trvalý link: http://hdl.handle.net/11104/0279799