Tunable dynamical magnetoelectric effect in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$ films

Tongshuai Zhu, Huaiqiang Wang, Haijun Zhang +1

More than forty years ago, axion was postulated as an elementary particle with a low mass and weak interaction in particle physics to solve the strong $\mathcal{C}\mathcal{P}$ (charge conjug…