GGA: Difference between revisions

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:{| border="1" cellspacing="0" cellpadding="5"
:{| border="1" cellspacing="0" cellpadding="5"
<!-- these first three options have been obsolete since VASP.4.X
<!-- these first three options have been obsolete since VASP.4.X
|PB || || Perdew -Becke
|PB || Perdew -Becke
|-
|-
|PW || || Perdew -Wang 86
|PW || Perdew -Wang 86
|-
|-
|LM || || Langreth-Mehl-Hu
|LM || Langreth-Mehl-Hu
|- -->
|- -->
|91 || || Perdew -Wang 91
|91 || Perdew -Wang 91
|-
|-
|PE || || Perdew-Burke-Ernzerhof
|PE || Perdew-Burke-Ernzerhof
|-
|-
|RP || || revised Perdew-Burke-Ernzerhof
|RP || revised Perdew-Burke-Ernzerhof
|-
|-
|AM || || AM05<ref name="armiento:prb:05"/><ref name="mattson:jcp:08"/><ref name="mattson:prb:09"/>
|AM || AM05<ref name="armiento:prb:05"/><ref name="mattson:jcp:08"/><ref name="mattson:prb:09"/>
|-
|-
|HL || || Hendin-Lundqvist<ref name="hedin1971"/>
|HL || Hendin-Lundqvist<ref name="hedin1971"/>
|-
|-
|CA || || Ceperley-Alder<ref name="ceperley1980"/>
|CA || Ceperley-Alder<ref name="ceperley1980"/>
|-
|-
|PZ || || Ceperley-Alder, parametrization of Perdew-Zunger<ref name="perdewzunger1981"/>
|PZ || Ceperley-Alder, parametrization of Perdew-Zunger<ref name="perdewzunger1981"/>
|-
|-
|WI || || Wigner<ref name="wigner1937"/>
|WI || Wigner<ref name="wigner1937"/>
|-
|-
|RP || || RPBE with Pade Approximation<ref name="hammer1999"/>
|RP || RPBE with Pade Approximation<ref name="hammer1999"/>
|-
|-
|VW || || Vosko-Wilk-Nusair<ref name="vokso1980"/> (VWN)
|VW || Vosko-Wilk-Nusair<ref name="vokso1980"/> (VWN)
|-
|-
|B3 || || B3LYP<ref name="b3lyp"/> (Joachim Paier), where LDA part is with VWN3-correlation
|B3 || B3LYP<ref name="b3lyp"/> (Joachim Paier), where LDA part is with VWN3-correlation
|-
|-
|B5 || || B3LYP (Joachim Paier), where LDA part is with VWN5-correlation
|B5 || B3LYP (Joachim Paier), where LDA part is with VWN5-correlation
|-
|-
|BF || || BEEF, xc (with libbeef)
|BF || BEEF, xc (with libbeef)
|-
|-
|CO || || no exchange-correlation
|CO || no exchange-correlation
|-
|-
|PS || || Perdew-Burke-Ernzerhof revised for solids (PBEsol)<ref name="perdew:prl:08"/>
|PS || Perdew-Burke-Ernzerhof revised for solids (PBEsol)<ref name="perdew:prl:08"/>
|}
|}



Revision as of 09:54, 2 February 2017

GGA = 91 | PE | RP | PS | AM
Default: GGA = type of exchange-correlation in accordance with the POTCAR file 

Description: GGA specifies the type of generalized-gradient-approximation one wishes to use.


This tag was added to perform GGA calculation with pseudopotentials generated with conventional LDA reference configurations.

Possible options are:

91 Perdew -Wang 91
PE Perdew-Burke-Ernzerhof
RP revised Perdew-Burke-Ernzerhof
AM AM05[1][2][3]
HL Hendin-Lundqvist[4]
CA Ceperley-Alder[5]
PZ Ceperley-Alder, parametrization of Perdew-Zunger[6]
WI Wigner[7]
RP RPBE with Pade Approximation[8]
VW Vosko-Wilk-Nusair[9] (VWN)
B3 B3LYP[10] (Joachim Paier), where LDA part is with VWN3-correlation
B5 B3LYP (Joachim Paier), where LDA part is with VWN5-correlation
BF BEEF, xc (with libbeef)
CO no exchange-correlation
PS Perdew-Burke-Ernzerhof revised for solids (PBEsol)[11]

The tags AM (AM05) and PS (PBEsol) are only supported by VASP.5.X. The AM05 functional and the PBEsol functional are constructed using different principles, but both aim at a decent description of yellium surface energies. In practice, they yield quite similar results for most materials. Both are available for spin polarized calculations.

References


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