Table 6. Energy Band Gaps (in eV) of Three-Dimensional AgI (Lattice Constant 6.169 Å, Rocksalt Structure386) Obtained for Various k-Points with the PBE Functionala.
method | L–L | Γ–Γ | X–X | L–X |
---|---|---|---|---|
NR | 3.89 | 3.42 | 3.71 | 1.48 |
1c ECP | 3.49 | 2.16 | 2.98 | 0.65 |
2c ECP | 3.25 | 1.82 | 2.69 | 0.41 |
4c DKS | 3.25 | 1.88 | 2.74 | 0.49 |
Nonrelativistic calculations (NR) are performed with the TZVPalls2/TZVPall basis set,387 whereas the ECP-based 1c and 2c calculations use the dhf-SVP(-2c) bases.388 Results taken from ref (385). Four-component Dirac–Kohn–Sham (DKS) reference values are taken from ref (389), employing the uncontracted Dyall-VDZ basis.390,391.