Rotation Induced Antiferroelectric-like Double Hysteresis of Perovskites

Antiferroelectric materials host both polar and anti-polar order parameters, and typically exhibit significant discontinuities in the first derivative of order parameters as a function of applied electric field, which results in double-hysteresis behavior useful for energy storage. In this talk, we investigate the coupling between the commonly observed oxygen octahedral rotations and polarization in strained perovskites, and the results of it on the hysteresis curves. We show that tuning the relative strength of polar and rotational instabilities leads to nontrivial hysteresis behavior. Consequently, the rotation coupling with polarization leads to an expanded search space of materials exhibiting antiferroelectric-like double hysteresis.