BEXX: Difference between revisions

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{{DEF|BEXX|1|if {{TAG|LHFCALC}}{{=}}.TRUE.}}
{{DEF|BEXX|1|if {{TAG|LHFCALC}}{{=}}.TRUE.}}


Description: {{TAG|BEXX}} specifies the fraction of short-range exact exchange in a Hartree-Fock-type/hybrid-functional calculation within the {{TAG|LMODELHF}} method.
Description: {{TAG|BEXX}} specifies the fraction of short-range exact exchange in range-separated hybrid-functionals constructed with {{TAG|LMODELHF}}=.TRUE.
{{mind|
{{Available|6.6.0}}
*Available as of VASP.6.6.0.
{{NB|important|Until VASP.6.5.1, the fraction of short-range exact exchange (when {{TAG|LMODELHF}}{{=}}.TRUE.) was fixed to 1 and could not be changed.}}
*The value of {{TAG|BEXX}} can be used only when
}}
----
----
{{not released}}
The {{TAG|BEXX}} tag specifies the fraction of short-range exact exchange in range-separated hybrid-functionals. This tag can be used only when {{TAG|LMODELHF}}=.TRUE. More details can be found in the description of this class of [[Hybrid_functionals:_formalism#HF_exchange_at_short_range_and_long_range_(error-function_screening)_with_different_mixings|hybrid functionals]].


== Related tags and articles ==
== Related tags and articles ==
{{TAG|AEXX}},
{{TAG|AEXX}},
{{TAG|LMODELHF}},
{{TAG|ALDAX}},
{{TAG|ALDAX}},
{{TAG|ALDAC}},
{{TAG|ALDAC}},

Latest revision as of 16:42, 5 February 2026

BEXX = [real] 

Default: BEXX = 1 if LHFCALC=.TRUE.

Description: BEXX specifies the fraction of short-range exact exchange in range-separated hybrid-functionals constructed with LMODELHF=.TRUE.

Mind: Available as of VASP 6.6.0
Important: Until VASP.6.5.1, the fraction of short-range exact exchange (when LMODELHF=.TRUE.) was fixed to 1 and could not be changed.

   Warning: Not yet released!

This page contains information about a feature that will be available in a future release of VASP. In other words, currently you cannot use it even with the latest version of VASP. The information may change significantly until it is released.

The BEXX tag specifies the fraction of short-range exact exchange in range-separated hybrid-functionals. This tag can be used only when LMODELHF=.TRUE. More details can be found in the description of this class of hybrid functionals.

Related tags and articles

AEXX, LMODELHF, ALDAX, ALDAC, AGGAX, AGGAC, AMGGAX, AMGGAC, LHFCALC, HFSCREEN, LRHFCALC, List of hybrid functionals, Hybrid functionals: formalism

Examples that use this tag

References