Table 1 Ground state structural parameters for wurtzite ZnO, rutile SnO2, and rocksalt MgO obtained with different approximations for the exchange-correlation potential in comparison to low-temperature experimental data
ZnO | GGA | PBE0 | scPBE0 | Exp. |
a [Å] | 3.289 | 3.258 | 3.255 | 3.248 [20] |
c [Å] | 5.308 | 5.236 | 5.230 | 5.204 [20] |
u | 0.381 | 0.381 | 0.381 | 0.382 [21] |
ε ∞ | 5.01 | 3.64 | 3.58 | 3.72 [22] |
α | − | 0.25 | 0.28 | − |
E gap [eV] | 0.715 | 3.132 | 3.425 | 3.4449 [17] |
SnO2 | GGA | PBE0 | scPBE0 | Exp. |
a [Å] | 4.834 | 4.757 | 4.752 | 4.737 [23] |
c [Å] | 3.244 | 3.193 | 3.190 | 3.186 [23] |
u | 0.307 | 0.306 | 0.306 | 0.307 [23] |
ε ∞ | 4.71 | 3.76 | 3.72 | 3.92 [24] |
α | − | 0.25 | 0.27 | − |
E gap [eV] | 0.609 | 3.591 | 3.827 | 3.596 [18] |
MgO | GGA | PBE0 | scPBE0 | Exp. |
a [Å] | 4.260 | 4.211 | 4.193 | 4.199 [25] |
ε ∞ | 3.22 | 2.98 | 2.90 | 3.01 [26] |
α | − | 0.25 | 0.34 | − |
E gap [eV] | 4.408 | 7.220 | 8.322 | 7.833 [19] |