KGAMMA: Difference between revisions

From VASP Wiki
No edit summary
(Remove redundant "Tags:" label — only one group in Related tags section)
 
(8 intermediate revisions by 2 users not shown)
Line 1: Line 1:
{{TAGDEF|KGAMMA|[logical]|.TRUE.}}
{{TAGDEF|KGAMMA|[logical]|.TRUE.}}


Description: Determines whether the k-points (determined by the tag {{TAG|KSPACING}} if {{TAG|KPOINTS}} file is not present) are center around ({{TAG|KGAMMA}}=''.TRUE.'') or shifted away ({{TAG|KGAMMA}}=''.FALSE.'') from the <math>\Gamma</math> point.
Description: Whether the automatically generated '''k'''-point mesh is centered at the <math>\Gamma</math> point.
 
----
----


== Related Tags and Sections ==
If {{TAG|KGAMMA|.TRUE.}} (default), the '''k'''-point mesh is centered at the <math>\Gamma</math> point, i.e., it always includes the <math>\Gamma</math> point. If {{TAG|KGAMMA|.FALSE.}}, the mesh is shifted away from the <math>\Gamma</math> point as in a Monkhorst-Pack grid. The number of '''k''' points on the mesh is controlled by {{TAG|KSPACING}} and {{TAG|KSPACING_OPT}}.
{{TAG|KSPACING}}
{{NB|important|If a {{FILE|KPOINTS}} file is present, VASP ignores the {{TAG|KGAMMA}} and {{TAG|KSPACING}} tags. Likewise, if a {{FILE|KPOINTS_OPT}} file is present, VASP ignores {{TAG|KGAMMA}} and {{TAG|KSPACING_OPT}}.}}


{{sc|KGAMMA|Examples|Examples that use this tag}}
== Related tags and articles ==
----
{{TAG|KSPACING}}, {{TAG|KSPACING_OPT}}
[[The_VASP_Manual|Contents]]
 
{{sc|KGAMMA|HowTo|Workflows that use this tag}}


[[Category:INCAR]]
[[Category:INCAR tag]][[Category:Crystal momentum]]

Latest revision as of 15:33, 20 March 2026

KGAMMA = [logical]
Default: KGAMMA = .TRUE. 

Description: Whether the automatically generated k-point mesh is centered at the [math]\displaystyle{ \Gamma }[/math] point.


If KGAMMA = .TRUE. (default), the k-point mesh is centered at the [math]\displaystyle{ \Gamma }[/math] point, i.e., it always includes the [math]\displaystyle{ \Gamma }[/math] point. If KGAMMA = .FALSE., the mesh is shifted away from the [math]\displaystyle{ \Gamma }[/math] point as in a Monkhorst-Pack grid. The number of k points on the mesh is controlled by KSPACING and KSPACING_OPT.

Important: If a KPOINTS file is present, VASP ignores the KGAMMA and KSPACING tags. Likewise, if a KPOINTS_OPT file is present, VASP ignores KGAMMA and KSPACING_OPT.

Related tags and articles

KSPACING, KSPACING_OPT

Workflows that use this tag