Abstract
Here, we present a theoretical study of the hybrid-improper ferroelectric (HIF) behavior at the [001] (Ba3SiO)1/(Ba3GeO)1 superlattices. Then, by means of first-principles calculations, we have investigated the structural and vibrational modes that allows the existence of the trilinear coupling phenomenon in this antiperovskite oxide heterostructure. The latter coupling, leading to a ferroelectric character in this system. Finally, we show the xy biaxial strain influence into the structure and the ferroelectricity, achieving an enhancement of the spontaneous polarization through this control parameter.
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Garcia-Castro, A.C., Quintero Orozco, J.H. & Paez Gonzalez, C.J. Hybrid-improper ferroelectric behavior in Ba3SiO/Ba3GeO oxide antiperovskite superlattices. Eur. Phys. J. B 92, 203 (2019). https://doi.org/10.1140/epjb/e2019-100175-1
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DOI: https://doi.org/10.1140/epjb/e2019-100175-1