Table 1.
G2D | C6V | C4V | C3V | C2V | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
GSub | C6V | C4V | C3V | C2V | C6V | C4V | C3V | C2V | C6V | C4V | C3V | C2V | C6V | C4V | C3V | C2V |
G2D@Sub | C6V | C2V | C3V | C2V | C2V | C4V | CV | C2V | C3V | CV | C3V | CV | C2V | C2V | CV | C2V |
∣Gsub∣ | 12 | 8 | 6 | 4 | 12 | 8 | 6 | 4 | 12 | 8 | 6 | 4 | 12 | 8 | 6 | 4 |
∣G2D@sub∣ | 12 | 4 | 6 | 4 | 4 | 8 | 2 | 4 | 6 | 2 | 6 | 2 | 4 | 4 | 2 | 4 |
N1 | 1 | 2 | 1 | 1 | 3 | 1 | 3 | 1 | 2 | 4 | 1 | 2 | 3 | 2 | 3 | 1 |
Here, GSub, G2D and G2D@Sub are symmetry groups of the substrate, the 2D material and the 2D material–substrate system, ∣Gsub∣ and ∣G2D@sub∣ are the orders of GSub and G2D@Sub; and N1 = ∣Gsub∣/∣G2D@sub∣ is the number of equivalent but different directions of the 2D material on the substrate.