Colossal infrared nonlinear optical anisotropy in a 2D charge-transfer Mott insulator.

ABSTRACT: Mott insulators are a unique class of materials whose insulating state originates from strong electron-electron correlations: the interactions localize charge carriers, and the resulting on-site Coulomb repulsion opens a charge gap, fundamentally different from conventional insulators, making these systems an exceptional platform for exploring exotic physical phenomena. Significantly, the interplay between strong correlations and charge transfer not only stabilizes the antiferromagnetic ground state but also endows the material with enriched properties, particularly in optics. Herein, we demonstrate a 2D antiferromagnetic charge-transfer Mott insulator, Vanadium Oxychloride (VOCl), which shows giant third-harmonic generation (THG) anisotropy (ρ_THG = I_x/I_y,

SUBMITTER: Duan R 

PROVIDER: S-EPMC12780175 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature