Electric toroidal octupolar symmetry in pyrite FeS${}_2$ probed by Raman optical activity

Yuki Suganuma, Gakuto Kusuno, Hikaru Watanabe +4

We report Raman optical activity in pyrite FeS${}_2$, which hosts an electric toroidal octupolar symmetry. A clear and reproducible sign reversal of the circular intensity difference…