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Table 2 The lattice parameters, bond length, and adsorption height of pristine and alkali-metal-adsorbed g-GaN

From: Alkali-metal-adsorbed g-GaN monolayer: ultralow work functions and optical properties

Adatom Pristine Li Na K Rb Cs
dN-X (Å) / 2.154 2.511 2.917 3.084 3.249
dGa-X (Å) / 2.635 2.975 3.371 3.530 3.701
Lattice parameters 3.254 3.241 3.253 3.259 3.261 3.268
Adsorption height (Å) / 2.501 2.718 3.102 3.335 3.598