Energy gap

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

Moderators: Davide Sangalli, andrea.ferretti, myrta gruning, andrea marini, Daniele Varsano, Conor Hogan

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Ou.Hala
Posts: 4
Joined: Tue Feb 28, 2017 3:35 pm

Energy gap

Post by Ou.Hala » Tue Jul 18, 2017 12:22 am

Dear developers,

At first, I'm working on quantum dots and I'm wondering if my results are correct or not.
When I performed DFT calculations, I found in the r-setup file that my system is a semi-metal. But when I did GW calculations, checking o.qp file, I found that DFT gap is 0.12 eV and GW is 1.91 eV.

What do you think of this results?

Thank you.

Hala Ouarrad

PhD student at Mohammed V University, Morocco.

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Daniele Varsano
Posts: 4198
Joined: Tue Mar 17, 2009 2:23 pm
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Re: Energy gap

Post by Daniele Varsano » Tue Jul 18, 2017 7:56 am

Dear Hala Ouarrad,
this is something that you should discuss with your supervisor or collaborators.
If there is something that it is not clear for you in reading the results, as a discrepancy between r_setup and output files, please post here the output and report files and we will have a look.

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/

Ou.Hala
Posts: 4
Joined: Tue Feb 28, 2017 3:35 pm

Re: Energy gap

Post by Ou.Hala » Tue Jul 18, 2017 11:47 pm

Dear Daniele,

Thank you for responding.


Hala Ouarrad

PhD student at Mohammed V University, Morocco.

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