Chiral Mesostructure‐Induced Ferroelectricity and Photoelectric Chiral Anisotropy of MnWO4

Abstract

Creating ferroelectricity in centrosymmetric and paramagnetic materials through nanostructures presents a challenge in materials science due to their high symmetry and paired spins. Herein, the induction of chirality‐induced ferroelectricity and photoelectric chiral anisotropy in chiral mesostructured MnWO4 films (CMWFs) resulting from spin chiral anisotropy in chiral mesostructures is reported. The CMWFs, prepared via a hydrothermal route induced by chiral molecules, consists of densely packed MnWO4 nanoparticle crystals exhibiting long‐range ordered helical lattice distortion grown perpendicularly along the 010 axis on the substrates. These CMWFs exhibit ferroelectric properties with a Curie temperature of ≈60 °C and photoelectric chiral anisotropy with an anisotropy factor of ≈0.5. The findings pave the way for ferroelectricity through long‐range spin current via chirality.

Keywords

• chirality
• ferroelectricity
• MnWO4
• photoelectric chiral anisotropy
• spin chiral anisotropy