Dielectric Evidence for Possible Type-II Multiferroicity in alpha-RuCl3

Jia-Cheng Zheng, Yi Cui, Tian-Run Li +3

$\alpha$-RuCl${}_3$ is a Mott insulator with a honeycomb lattice with strong spin-orbit coupling. We report dielectric measurements on $\alpha$-RuCl${}_3$ single crystals under field. At zero fi…