LPARD: Difference between revisions
(Created page with "{{TAGDEF|LPARD|[logical]|.FALSE.}} Description: Determines whether partial (band and/or '''k''' point decomposed) charge densities are evaluated. ---- A {{TAG|LPARD}} calculation is a postprocessing step that requires a pre-converged calculation. It writes the partial density, or multiple partial charge densities, to one {{FILE|PARCHG}} file or several PARCHG.*.* files, depending of the setting of {{TAG|LSEPB}} and {{TAG|LSEPK}}. {{NB|warning| The orbitals read from th...") |
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Description: Determines whether partial (band and/or '''k''' point decomposed) charge densities are evaluated. | Description: Determines whether partial (band and/or '''k''' point decomposed) charge densities are evaluated. | ||
---- | ---- | ||
An {{TAG|LPARD}} run is a postprocessing step that requires a pre-converged calculation. It writes the partial density, or multiple partial charge densities, to one {{FILE|PARCHG}} file or several PARCHG.*.* files, depending of the setting of {{TAG|LSEPB}} and {{TAG|LSEPK}}. | |||
{{NB|warning| The orbitals read from the {{FILE|WAVECAR}} file must be converged in a prior VASP run.}} | {{NB|warning| The orbitals read from the {{FILE|WAVECAR}} file must be converged in a prior VASP run.}} | ||
{{NB|warning| {{TAG|LPARD}} is not supported for non-collinear calculations ({{TAG|LNONCOLLINEAR}}{{=}}true).}} | {{NB|warning| {{TAG|LPARD}} is not supported for non-collinear calculations ({{TAG|LNONCOLLINEAR}}{{=}}true).}} | ||
Revision as of 10:13, 6 February 2024
LPARD = [logical]
Default: LPARD = .FALSE.
Description: Determines whether partial (band and/or k point decomposed) charge densities are evaluated.
An LPARD run is a postprocessing step that requires a pre-converged calculation. It writes the partial density, or multiple partial charge densities, to one PARCHG file or several PARCHG.*.* files, depending of the setting of LSEPB and LSEPK.
| Warning: The orbitals read from the WAVECAR file must be converged in a prior VASP run. |
| Warning: LPARD is not supported for non-collinear calculations (LNONCOLLINEAR=true). |
There are various ways to divide the valence charge density. You can pick the contributing bands either by index (refer to NBMOD and IBAND) or by energy range (refer to EINT), and select contributing k points through KPUSE.
| Mind: If only the LPARD tag is set, without any other tags to specify the separation of charge, then the NBMOD tag defaults to -1. The valence charge density (without the augmentation charges) is then written to the CHGCAR file and no PARCHG file is written. |
Related tags and articles
IBAND, EINT, NBMOD, KPUSE, LSEPB, LSEPK, PARCHG, Band decomposed charge densities