(2) Calculations of the band dispersion of NaF in the rock salt structure, where the nonspin polarized collinear calculation with the lattice constant of 4.62 Ang. was performed using Na_PBE.vps, F_PBE19.vps, Na9.0s3p2d1, and F6.0s2p2d1, and the origin of the energy is taken to be the top of the valence band. The input file used for the OpenMX calculations can be found at NaFBand.dat . For comparison the result by the Wien2k code is also shown, where the calculation was performed by default setting in the Ver. 10.1 of Wien2k except for the use of R_{MT} x K_{MAX} of 12.




Equilibrium bond length (Ang.)  Atomization energy (eV)  Atomization energy (couterpoise corrected) (eV)  




F7.0s3p3d2  1.455  2.406  2.399 
F7.0s4p4d4f3  1.432  2.615  2.602 
Other calc.  1.430 ^{a}  2.236 ^{a}   
Expt.  1.412 ^{b}  1.6 ^{b}   



