Fig. 5: Phase diagram of HIF A3B2O7 compounds under biaxial strain. | npj Computational Materials

Fig. 5: Phase diagram of HIF A3B2O7 compounds under biaxial strain.

From: Suppressing the ferroelectric switching barrier in hybrid improper ferroelectrics

Fig. 5: Phase diagram of HIF A3B2O7 compounds under biaxial strain.

Red color represents ferroelectric (HIF) phase, the others are all non-polar structures. Results for Ba3Ti2O7 (t = 1.06) and Ba3Ge2O7 (t = 1.10), which do not display any rotation or tilting, are not shown here. Proper ferroelectric phases of large tolerance factor compounds, such as the one in Sr3Ti2O7 under large tensile strain25,46, are not displayed either.

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