triplet excitons

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

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nrbsh
Posts: 17
Joined: Fri Dec 18, 2015 5:50 pm

triplet excitons

Post by nrbsh » Tue Feb 16, 2016 5:00 pm

Dear yambo developer,

I interested to calculate the triplet exciton in a non polarized system.
Do I need to run DFT for spin resolve system?

Best regards,
Zara
Tehran University

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Daniele Varsano
Posts: 4198
Joined: Tue Mar 17, 2009 2:23 pm
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Re: triplet excitons

Post by Daniele Varsano » Tue Feb 16, 2016 9:00 pm

Dear Zara,
No, in principle it is not needed.
You can calculate triplet excitation in BSE simply not including the exchange part in the kernel.
This can be done by setting:

Code: Select all

BSENGexx= 0
and eventually including the coupling term.
See eg: M. Rohlfing and SG. Louie PRB 62 4927 (2000)

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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