Matteo, thanks for getting back.  If there’s any “simple” chore I might be able 
to help with, let me know.  Hope to see you at APS March Baltimore upcoming.

 

Ciao, -Paul

 

From: [email protected] [mailto:[email protected]] On Behalf 
Of Matteo Cococcioni
Sent: Thursday, January 21, 2016 11:08 PM
To: PWSCF Forum
Subject: Re: [Pw_forum] LDA+U+Phonons in QE 5.3.0

 

Dear Paul,

 

yes, the implementation that allows DFPT calculations from a DFT+U ground state 
is quite substantial (especially with US PPs). Unfortunately, we could only 
work on this project intermittently for the past years, and the progress has 
been slow. We are still working to improve the code and clear some problems; it 
will be released in some form when we feel it is ready. 

 

Matteo

 

 

On Sun, Jan 17, 2016 at 2:10 AM, W2AGZ <[email protected]> wrote:

I just had a quick look at the source code, phq.readin.f90 in QE release 5.3.0, 
and see that support of lda_plus_u is still not supported for the calculation 
of electron-phonon interactions in Hubbard manifolds.  It’s been a number of 
years since this issue was originally posted on pw_forum.  Is their a 
particular problem within the QE formalism, maybe in the basis set resulting 
from a Hubbard calculation, that would make this extremely difficult…or 
impossible…to implement?   What source code routines would need 
modification/replacement?

 

Thanks, -Paul  

 

Paul Michael Grant, PhD

Physicist and Science Writer

Senior Life Fellow, American Physical Society

Fellow, Institute of Physics, United Kingdom

APS Distinguished Lecturer on Applications of Physics (2014-15) 

Staff Associate, Jet Propulsion Laboratory, NASA (2011-15)

Visiting Scholar, Applied Physics, Stanford (2005-2008)

EPRI Science Fellow (Retired)

IBM Research Staff Member/Manager Emeritus

Principal, W2AGZ Technologies

 <mailto:[email protected]> [email protected]

 <http://www.w2agz.com/> http://www.w2agz.com

 


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