SnxPy Monolayers: a New Type of Two-Dimensional Materials with High Stability, Carrier Mobility, and Magnetic Properties

Table 1 Lattice parameters and calculated formation energy of the Sn_xP_y monolayers

Sn_xP_y monolayers	Lattice parameters						Space group	Formation energy (eV/atom)
Sn_xP_y monolayers	a	b	c	Alpha	Beta	Gamma	Space group	Formation energy (eV/atom)
P\( \overline{6} \)m2-SnP	3.95	3.95	17.16	90	90	120	P\( \overline{6} \)m2	− 0.235
P\( \overline{3} \)m1-SnP	3.96	3.96	17.11	90	90	120	P\( \overline{3} \)m1	− 0.223
Pmc2₁-SnP₂	3.71	10.78	15.83	90	90	90	Pmc2₁	− 0.159
P\( \overline{4}{2}_1 \)m-SnP₂	7.59	7.59	14.66	90	90	126.69	P\( \overline{4}{2}_1 \)m	− 0.016