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AMGGAX

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AMGGAX = [real] 

Default: AMGGAX = 1.0-AEXX if LHFCALC=.TRUE.
= 1.0 if LHFCALC=.FALSE.

Description: AMGGAX is a parameter that multiplies the meta-GGA exchange functional (available as of VASP.6.4.0).

AMGGAX can be used as the fraction of meta-GGA exchange in a Hartree-Fock/DFT hybrid functional (possible since VASP.6.4.0).

Important: AMGGAX can be used only if LHFCALC=.TRUE.
Mind:
  • Note the difference with respect to AGGAX: AMGGAX multiplies the whole meta-GGA exchange functional, while AGGAX multiplies only the gradient-correction term of a GGA exchange functional.
  • AMGGAX is implemented for the functionals from Libxc (see LIBXC1 for details).

Related tags and articles

AEXX, ALDAX, ALDAC, AGGAX, AGGAC, AMGGAC, LHFCALC, List of hybrid functionals, Hybrid functionals: formalism

Examples that use this tag

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