LAD+U in Yambo

Deals with issues related to computation of optical spectra in reciprocal space: RPA, TDDFT, local field effects.

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hongtang2023
Posts: 45
Joined: Thu Mar 16, 2023 7:02 am

LAD+U in Yambo

Post by hongtang2023 » Fri Nov 17, 2023 12:02 am

Dear Yambo team,

I need to use PBE+U for my system to open the gap. However, when I use Yambo.5.1.1 py2 to convert to yambo file, I got error:

Code: Select all

...
 <---> DBs path set to : ../../YAMBO/
 <02s> detected QE data format : qexsd-hdf5
 <02s> == PWscf v.6.x generated data (QEXSD-HDF5 fmt) ==
 <02s> Header/K-points/Energies... done
 <07s> Cell data...
 <08s> [WARNING]Two or more crystal structures fit the given cell done
 <08s> Atomic data... done
 <09s> Symmetries...[SI no]...[I yes]...[-I no]...[TR yes]
[ERROR] LDA+U. Hubbard correction is not considered in yambo.
Is Yambo with no DFT+U function? or is there any way I can do it?

Appreciate!


Best,
Hong
Dr. Hong Tang
Tulane University
New Orleans, LA
70118, USA

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Davide Sangalli
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Re: LAD+U in Yambo

Post by Davide Sangalli » Fri Nov 17, 2023 8:48 am

Dear Hong,
please read this topic:
viewtopic.php?p=13330#p13330

Best,
D.
Davide Sangalli, PhD
CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit) and MaX Centre
https://sites.google.com/view/davidesangalli
http://www.max-centre.eu/

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Daniele Varsano
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Re: LAD+U in Yambo

Post by Daniele Varsano » Fri Nov 17, 2023 9:19 am

Dear Hong ,
in addition to the thread indicated by Davide, let me add that at the moment it is possible to perform BSE on top of LDA+U., but not a GW calculation. The possibility to perform a GW calculation on top is nearly completed and will be released very soon.

Best,
Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/

hongtang2023
Posts: 45
Joined: Thu Mar 16, 2023 7:02 am

Re: LAD+U in Yambo

Post by hongtang2023 » Mon Dec 04, 2023 3:40 am

Dear Davide and Daniele,

Thank you so much!

Could you please let us know weather "non-symmorphic symmetry" is also ok in the newer vision Yambo code?

Best,
Hong
Dr. Hong Tang
Tulane University
New Orleans, LA
70118, USA

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Daniele Varsano
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Re: LAD+U in Yambo

Post by Daniele Varsano » Mon Dec 04, 2023 12:22 pm

Dear Hong Tang,

non-symmorphic symmetry should be avoided!

Best,

Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/

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