Fig. 3: Structures and phase transition properties of (S−3AMP)x(R−3AMP)1-xPbBr4. | Nature Communications

Fig. 3: Structures and phase transition properties of (S−3AMP)x(R−3AMP)1-xPbBr4.

From: Tuning ferroelectric phase transition temperature by enantiomer fraction

Fig. 3

a PXRD patterns; b DSC curves; c Nonlinear correlation between the TC and x (0.5–1). d Curves of enthalpy change, entropy change, and N with x, N is the proportion of the numbers of possible geometrical orientations allowed in the FEP and PEP. e Phase diagram and the point groups. The colors represent different crystallographic point groups, corresponding to the written point group symbols, and the orange region is roughly estimated due to the difficulty in obtaining ideal crystals. f Linear correlation between the TC and x (0.70–1). The solid lines fit a linear regression model with the corresponding R2 value, 95% confidence band, and 95% prediction band (shaded region). g PXRD peak representing the plane spacing of adjacent [PbBr4] inorganic layers. h Schematic diagram of crystal structure change with enantiomer content.

Back to article page