Incommensurate charge super-modulation and hidden dipole order in layered kitaev material α-RuCl₃.

ABSTRACT: The magnetism of Kitaev materials has been widely studied, but their charge properties and the coupling to other degrees of freedom are less known. Here we investigate the charge states of α-RuCl₃, a promising Kitaev quantum spin liquid candidate, in proximity to graphite. We discover that few-layered α-RuCl₃ experiences a clear modulation of charge states, where a Mott-insulator to weak charge-transfer-insulator transition in the 2D limit occurs by means of heterointerfacial polarization. More notably, distinct signals of incommensurate charge and lattice super-modulations, regarded as an unconventional charge order, accompanied in the insulator. Our theoretical calculations have reproduced the incommensurate charge order by taking into account the antiferroelectrici

SUBMITTER: Zheng X 

PROVIDER: S-EPMC11372116 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature