optical spectrum

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)

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

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

optical spectrum

Post by samaneh » Tue Jul 28, 2015 12:01 pm

Dear Developers,
I did some calculations with yambo -o c -k hartree
and I have output files for q1, q2, ...
would you please tell me what is the meaning of these
Qs?
and which of these files is important to plot(e.g. for epsilon)?
I saw in the tutorial that plot the spectrum just for the q1!!
All the best
S. Ataei, University of Tehran, Iran
S. Ataei, PhD student at University of Tehran, Iran.

User avatar
Daniele Varsano
Posts: 4198
Joined: Tue Mar 17, 2009 2:23 pm
Contact:

Re: optical spectrum

Post by Daniele Varsano » Tue Jul 28, 2015 12:31 pm

Dear S. Atei,
The q's are the transferred momenta, which are important if you are interested to electron energy loss spectra. If you need the optical sepectrum only you are interested to q1, which is the limit q->0 and you can avoid to calculate the other q just setting:

Code: Select all

%QpntsRXd				
1|1|		#	(Xd)	Transferred momenta
%
in the input file.

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/

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

Re: optical spectrum

Post by samaneh » Tue Jul 28, 2015 12:33 pm

Dear Daniele,

Thank you for your helpful comments.
Best regards
S. Ataei
S. Ataei, PhD student at University of Tehran, Iran.

Post Reply