LIBXC1: Difference between revisions
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{{TAG|LIBXC2}} = MGGA_C_SCAN | {{TAG|LIBXC2}} = MGGA_C_SCAN | ||
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<ref name="libxc">https://www.tddft.org/programs/libxc/]</ref> | |||
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== Related Tags and Sections == | == Related Tags and Sections == | ||
Revision as of 09:42, 21 December 2021
LIBXC1 = [integer] or [string]
Description: LIBXC1 and LIBXC2 specify the functionals from the library of exchange-correlation functionals [1][2] that one wants to use.
LIBXC1 and LIBXC2 can be either integers or strings. The available functionals are listed on the Libxc website[3] and are essentially of three types: exchange (_X_), correlation (_C_) or exchange-correlation (_XC_). The possibilities for LIBXC1 and LIBXC2 are the following:
- Both LIBXC1 and LIBXC2 are specified and correspond to the exchange (_X_) and correlation (_C_) functionals, respectively, or the reverse.
- Only LIBXC1 (or LIBXC2 ) is specified and corresponds to an exchange (_X_) or exchange-correlation (_XC_) functional. It can also be a correlation (_C_) functional, but such a calculation without exchange would not make sense. Examples of how to specify a Libxc functional in INCAR are given below for the PBE[4] and SCAN functionals[5].
- PBE
GGA = LIBXC LIBXC1 = 101 LIBXC2 = 130
or
GGA = LIBXC LIBXC1 = GGA_X_PBE LIBXC2 = GGA_C_PBE
- SCAN
METAGGA = LIBXC LIBXC1 = 101 LIBXC2 = 130
or
METAGGA = LIBXC LIBXC1 = MGGA_X_SCAN LIBXC2 = MGGA_C_SCAN
- ↑ M. A. L. Marques, M. J. T. Oliveira, and T. Burnus, Comput. Phys. Commun., 183, 2272 (2012).
- ↑ S. Lehtola, C. Steigemann, M. J. T. Oliveira, and M. A. L. Marques, SoftwareX, 7, 1 (2018).
- ↑ https://www.tddft.org/programs/libxc/]
- ↑ J. P. Perdew, K. Burke, and M. Ernzerhof, Phys. Rev. Lett., 77, 3865 (1996).
- ↑ J. Sun, A. Ruzsinszky, and J. P. Perdew, Phys. Rev. Lett. 115, 036402 (2015).
Related Tags and Sections
AGGAX, AGGAC, ALDAC, LHFCALC, hybrid functionals, settings for specific hybrid functionals