PARAM2: Difference between revisions
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Description: The {{TAG|PARAM2}} tag determines the value corresponding to different parameters depending on the {{TAG|GGA}} functional that is chosen: | Description: The {{TAG|PARAM2}} tag determines the value corresponding to different parameters depending on the {{TAG|GGA}} functional that is chosen: | ||
*<math>\kappa</math> in the exchange GGA optB86b{{cite|klimes:prb:2011}} (<math>\kappa</math> is not shown in this work and is implicitly set to 1.0), B86R{{cite|hamada:prb:2014}}, and DF3-opt2{{cite|chakraborty:jctc:2020}} functionals, which have the same analytical form and correspond to {{TAG|GGA}}=MK. {{TAG|PARAM2}} should in principle be set to 1.0 for the nonlocal optB86b-vdW functional{{cite|klimes:prb:2011}}, to 0.711357 for the nonlocal rev-vdW-DF2{{cite|hamada:prb:2014}} functional, or to <math>0.58</math> for the vdW-DF3-opt2 functional{{cite|chakraborty:jctc:2020}}. | *<math>\kappa</math> in the exchange GGA optB86b{{cite|klimes:prb:2011}} (<math>\kappa</math> is not shown in this work and is implicitly set to 1.0), B86R{{cite|hamada:prb:2014}}, and DF3-opt2{{cite|chakraborty:jctc:2020}} functionals, which have the same analytical form and correspond to {{TAG|GGA}}=MK. {{TAG|PARAM2}} should in principle be set to 1.0 for the nonlocal optB86b-vdW functional{{cite|klimes:prb:2011}}, to 0.711357 for the nonlocal rev-vdW-DF2{{cite|hamada:prb:2014}} functional, or to <math>0.58</math> for the vdW-DF3-opt2 functional{{cite|chakraborty:jctc:2020}}. | ||
*<math>\mu</math> in the exchange GGA optB88{{cite|klimes:jpcm:2010}} and DF3-opt1{{cite|chakraborty:jctc:2020}} functionals, which have the same analytical form and correspond to {{TAG|GGA}}=BO. {{TAG|PARAM2}} should in principle be set to 0.22 for the nonlocal optB88-vdW functional{{cite|klimes:jpcm:2010}} or to <math>10/81\approx0. | *<math>\mu</math> in the exchange GGA optB88{{cite|klimes:jpcm:2010}} and DF3-opt1{{cite|chakraborty:jctc:2020}} functionals, which have the same analytical form and correspond to {{TAG|GGA}}=BO. {{TAG|PARAM2}} should in principle be set to 0.22 for the nonlocal optB88-vdW functional{{cite|klimes:jpcm:2010}} or to <math>10/81\approx0.1234568</math> for the vdW-DF3-opt1{{cite|chakraborty:jctc:2020}} functional. | ||
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Revision as of 12:38, 30 January 2024
PARAM2 = [real]
Default: PARAM2 = 1.0
Description: The PARAM2 tag determines the value corresponding to different parameters depending on the GGA functional that is chosen:
- in the exchange GGA optB86b[1] ( is not shown in this work and is implicitly set to 1.0), B86R[2], and DF3-opt2[3] functionals, which have the same analytical form and correspond to GGA=MK. PARAM2 should in principle be set to 1.0 for the nonlocal optB86b-vdW functional[1], to 0.711357 for the nonlocal rev-vdW-DF2[2] functional, or to for the vdW-DF3-opt2 functional[3].
- in the exchange GGA optB88[4] and DF3-opt1[3] functionals, which have the same analytical form and correspond to GGA=BO. PARAM2 should in principle be set to 0.22 for the nonlocal optB88-vdW functional[4] or to for the vdW-DF3-opt1[3] functional.
Related tags and articles
PARAM1, GGA, Nonlocal vdW-DF functionals
- ↑ a b J. Klimeš, D. R. Bowler, and A. Michaelides, Phys. Rev. B 83, 195131 (2011).
- ↑ a b I. Hamada, Phys. Rev. B 89, 121103(R) (2014).
- ↑ a b c d D. Chakraborty, K. Berland, and T. Thonhauser, Next-Generation Nonlocal van der Waals Density Functional, J. Chem. Theory Comput. 16, 5893 (2020).
- ↑ a b J. Klimeš, D. R. Bowler, and A. Michaelides, J. Phys.: Condens. Matter 22, 022201 (2010).