Include spin orbit coupling only in Green's function and not in Screening

You can find here problems arising when using old releases of Yambo (< 5.0). Issues as parallelization strategy, performance issues and other technical aspects.

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batman
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Joined: Sun Jun 20, 2021 2:04 pm

Include spin orbit coupling only in Green's function and not in Screening

Post by batman » Sun May 08, 2022 8:10 am

Dear Developers,

Is there a way where I can compute the screening (both dynamic and static) without spin orbit interaction and use them in G0W0(also BSE too) with spin orbit coupling included only in green's function?

Thank you,

Best regards,
Murali
Muralidhar Nalabothula
Doctoral student at Department of Physics and Materials Science,
Université du Luxembourg

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Daniele Varsano
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Re: Include spin orbit coupling only in Green's function and not in Screening

Post by Daniele Varsano » Sun May 08, 2022 11:22 am

Dear Murali,

probably it is possible (you will need to trick the code that will complain in using a database coming from a different SAVE directory).
Anway if SOC is important it will affect the band structure of the system so neglecting it in the screening, it will provide rather inaccurate result.
Next, I cannot exclude that there could be problems due to the fact that the two calculations of the ground state are done with different pseudopotentials.

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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claudio
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Re: Include spin orbit coupling only in Green's function and not in Screening

Post by claudio » Sun May 08, 2022 7:59 pm

Dear Murali

this possibility is present in Yambo 5.1 that will be released within one week more or less

best
Claudio
Claudio Attaccalite
[CNRS/ Aix-Marseille Université/ CINaM laborarory / TSN department
Campus de Luminy – Case 913
13288 MARSEILLE Cedex 09
web site: http://www.attaccalite.com

batman
Posts: 12
Joined: Sun Jun 20, 2021 2:04 pm

Re: Include spin orbit coupling only in Green's function and not in Screening

Post by batman » Tue May 10, 2022 9:06 pm

Dear Daniele and Claudio,

Thanks for the reply. I was just curious if this is possible as I read in a paper that the effect of SOC on screening is small for some systems. (https://journals.aps.org/prb/abstract/1 ... .84.085144). Anyways, I will try it out when the new release is out

Best regards,
Murali
Muralidhar Nalabothula
Doctoral student at Department of Physics and Materials Science,
Université du Luxembourg

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claudio
Posts: 472
Joined: Tue Mar 31, 2009 11:33 pm
Location: Marseille
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Re: Include spin orbit coupling only in Green's function and not in Screening

Post by claudio » Thu May 12, 2022 11:25 am

Dear Murali

the new version of the code is available here:

https://github.com/yambo-code/yambo/wik ... gz-format)

best
Claudio
Claudio Attaccalite
[CNRS/ Aix-Marseille Université/ CINaM laborarory / TSN department
Campus de Luminy – Case 913
13288 MARSEILLE Cedex 09
web site: http://www.attaccalite.com

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