LDAU: Difference between revisions

From VASP Wiki
No edit summary
No edit summary
Line 3: Line 3:
Description: {{TAG|LDAU}}=.TRUE. switches on the L(S)DA+U.
Description: {{TAG|LDAU}}=.TRUE. switches on the L(S)DA+U.
----
----
'''Note on bandstructure calculation''': The {{FILE|CHGCAR}} file contains only information up to angular momentum quantum number ''L''={{TAG|LMAXMIX}} for the [[LDAUTYPE#occmat|on-site PAW occupancy matrices]]. When the {{FILE|CHGCAR}} file is read and kept fixed in the course of the calculations ({{TAG|ICHARG}}=11), the results will be necessarily not identical to a selfconsistent run. The deviations are often large for L(S)DA+U calculations. For the calculation of band structures within the L(S)DA+U approach, it is hence strictly required to increase {{TAG|LMAXMIX}} to 4 (d elements) and 6 (f elements).
'''Note on bandstructure calculation''': The {{FILE|CHGCAR}} file contains only information up to angular momentum quantum number ''L''={{TAG|LMAXMIX}} for the [[LDAUTYPE#occmat|on-site PAW occupancy matrices]]. When the {{FILE|CHGCAR}} file is read and kept fixed in the course of the calculations ({{TAG|ICHARG}}=11), the results will be necessarily not identical to a selfconsistent run. The deviations are often large for DFT+U calculations. For the calculation of band structures within the DFT+U approach, it is hence strictly required to increase {{TAG|LMAXMIX}} to 4 (d elements) and 6 (f elements).


== Related Tags and Sections ==
== Related Tags and Sections ==

Revision as of 17:59, 6 April 2022

LDAU = .TRUE. | .FALSE.
Default: LDAU = .FALSE. 

Description: LDAU=.TRUE. switches on the L(S)DA+U.


Note on bandstructure calculation: The CHGCAR file contains only information up to angular momentum quantum number L=LMAXMIX for the on-site PAW occupancy matrices. When the CHGCAR file is read and kept fixed in the course of the calculations (ICHARG=11), the results will be necessarily not identical to a selfconsistent run. The deviations are often large for DFT+U calculations. For the calculation of band structures within the DFT+U approach, it is hence strictly required to increase LMAXMIX to 4 (d elements) and 6 (f elements).

Related Tags and Sections

LDAUTYPE, LDAUL, LDAUU, LDAUJ, LDAUPRINT, LMAXMIX

Examples that use this tag


Contents