Table 1 The symmetry properties (Point Group) and polarization directions (Out-of-plane and In-Plane) of 6 different trilayer stacking configurations
From: Cluster sliding ferroelectricity in trilayer Quasi-Hexagonal C60
Stacking configurations | Point Group | Out-of-plane (OP) polarization | In-plane (IP) polarization |
|---|---|---|---|
AB’A’, AB’C’ | m | ✓ | ✓ |
ABA, AB’A | mm2 | × | ✓ |
ABC, AB’C | 2/m | × | × |
