LNABLA: Difference between revisions

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Except for the purpose of testing, there is however hardly ever a reason
Except for the purpose of testing, there is however hardly ever a reason
to use the transversal expression, since it is less accurate.
to use the transversal expression, since it is less accurate.
== Related Tags and Sections ==
== Related tags and articles ==
{{TAG|LOPTICS}},
{{TAG|LOPTICS}},
{{TAG|CSHIFT}}
{{TAG|CSHIFT}}
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</references>
</references>
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[[The_VASP_Manual|Contents]]


[[Category:INCAR]][[Category:Frequency dependent dielectric properties]]
[[Category:INCAR tag]][[Category:Linear response]][[Category:Dielectric properties]]

Latest revision as of 14:27, 19 July 2022

LNABLA = .TRUE. | .FALSE.
Default: LNABLA = .FALSE. 

Description: LNABLA=.TRUE. evaluates the transversal expression for the frequency dependent dielectric matrix.


Usually VASP uses the longitudinal expression for the frequency dependent dielectric matrix. It is however possible to switch to the computationally somewhat simpler transversal expressions by selecting LNABLA=.TRUE. (Eqs. 17 and 20 in Ref.[1]). In this simplification the imaginary part of the macroscopic dielectric function is given by

Except for the purpose of testing, there is however hardly ever a reason to use the transversal expression, since it is less accurate.

Related tags and articles

LOPTICS, CSHIFT

Examples that use this tag

References