Electric Field-Induced Nonreciprocal Directional Dichroism in a Time-Reversal-Odd Antiferromagnet.

ABSTRACT: Antiferromagnets with broken time-reversal ( T$\mathcal{T}$ ) symmetry ( T$\mathcal{T}$ -odd antiferromagnets) have gained extensive attention, mainly due to their ferromagnet-like behavior despite the absence of net magnetization. However, certain types of T$\mathcal{T}$ -odd antiferromagnets remain inaccessible by the typical ferromagnet-like phenomena (e.g., anomalous Hall effect). One such system is characterized by a T$\mathcal{T}$ -odd scalar quantity, the magnetic toroidal monopole. To access the broken T$\mathcal{T}$ symmetry in such a system, a unique nonreciprocal optical phenomenon, electric field-induced nonreciprocal directional dichroism (E-induced NDD), is employed. Signals of E-induced NDD are successfully detected in a T$\mathcal{T}$ -odd antiferromagnet, Co₂SiO₄, whose ma

SUBMITTER: Hayashida T 

PROVIDER: S-EPMC11881677 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature