Table 5.

Calculated (PBE/BEEF‐vdW) and theoretical reference dimer interaction energies E _int of two Mg adatoms on (6×3) Mg(10$\bar{1}$ 0)A. E _int was calculated with Equation (3) and the adatoms were initially placed at positions 0 & x. For the BEEF‐vdW functional, the calculated standard deviation of the dimer interaction energy $E_{\mathrm{i}\mathrm{n}\mathrm{t}}$ is given in parenthesis.

Position	E int [eV] for Mg(10$\bar{1}$ 0)A
	this work		other work
	PBE	BEEF‐vdW	PBE	Ref.
0 & 1	−0.28	−0.25 (0.06)	−0.25	[30]
0 & 2	−0.01	−0.02 (0.01)	–	–
0 & 3	0.02	0.02 (0.02)	–	–
0 & 4	0.01	0.01 (0.01)	–	–