Properties of the Free-Standing Two-Dimensional Copper Monolayer

Table 1

Comparison of the predicted properties of Cu, Ag, and Au free-standing 2D monolayers.

	Bond length, Å	⁢Bond length extension				Bulk	2D cohesive energy,; eV/atom	Bulk cohesive energy,; eV/atom	In-plane stiffness, N/m	Highest phonon freq, cm^−1
		500 K	800 K	1200 K	1400 K	Melting Pt, K
Cu	2.41	16%	29%	33%	Melted	1356	2.76	3.48		325
Ag	2.79	29%	36%	Melted		1235	2.01	2.49	31	230
Au	2.73	12%	17%	21%	43%	1338	2.82	3.11	56	220