Room-temperature terahertz anomalous Hall effect in Weyl antiferromagnet Mn₃Sn thin films.

ABSTRACT: Antiferromagnetic spin motion at terahertz (THz) frequencies attracts growing interests for fast spintronics, however, their smaller responses to external field inhibit device application. Recently the noncollinear antiferromagnet Mn₃Sn, a Weyl semimetal candidate, was reported to show large anomalous Hall effect (AHE) at room temperature comparable to ferromagnets. Dynamical aspect of such large responses is an important issue to be clarified for future THz data processing. Here the THz anomalous Hall conductivity in Mn₃Sn thin films is investigated by polarization-resolved spectroscopy. Large anomalous Hall conductivity [Formula: see text] at THz frequencies is clearly observed as polarization rotation. A peculiar temperature dependence corresponding to the breaking

SUBMITTER: Matsuda T 

PROVIDER: S-EPMC7021706 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature