GW calculatin

Concerns issues with computing quasiparticle corrections to the DFT eigenvalues - i.e., the self-energy within the GW approximation (-g n), or considering the Hartree-Fock exchange only (-x)

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samaneh
Posts: 165
Joined: Tue Jan 21, 2014 9:03 am

GW calculatin

Post by samaneh » Tue Oct 21, 2014 2:33 pm

Hello Developers,

1- Is that possible to to do GW calculation with HSE or PBE0 functional of espresso package???
2- What is the meaning of DFT and HF in output file?

Thanks
S. Ataei, University of Tehran, Iran
S. Ataei, PhD student at University of Tehran, Iran.

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Daniele Varsano
Posts: 4198
Joined: Tue Mar 17, 2009 2:23 pm
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Re: GW calculatin

Post by Daniele Varsano » Tue Oct 21, 2014 2:52 pm

Drear Samaneh,
1) No, there is people working on that, but at the moment it is not possible to perform GW calculations on top of hybrid functionals.
2) <HF> is the exchange self energy, see here.
<DFT> is the mean value of <n|Vxc|n>, where Vxc is the exchange-correlation potential you used in your ground state calculation.
Both this terms are needed for the calculation of the GW corrections (see here)
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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