[Pw_forum] electron-phonon coupling, nesting, double-delta

[Feng, Zimin]

Hi Nicki,
Let me know if this is what you are trying to do:
http://prb.aps.org/abstract/PRB/v88/i18/e184302
fzm 

-----Message d'origine-----
De : pw_forum-bounces at pwscf.org [mailto:pw_forum-bounces at pwscf.org] De la part de nicvok
Envoyé : 27 janvier 2014 13:28
À : pw_forum at pwscf.org
Objet : [Pw_forum] electron-phonon coupling, nesting, double-delta

Dear all,

I am trying to extract the nesting function/double delta X(q,\nu) (sim. to eq.(22)/(A1) in Wierzbowska et al. http://arxiv.org/abs/cond-mat/0504077)
out of QE503. I would like to have it in the same way as the phonon linewidth g(q,\nu) (gamma(i,n) in matdyn.f90).
A starting point would be gf(mu,nu,isig) in elphon.f90 and/or phase_space in elphsum_simple in elphon.f90, which should both represent the double delta by using gaussians. However, I am right now puzzled and wondering where I have to search/work for an direct output of the nesting function for arbitrary q?

I would appreciate any hint.
Nicki

-------------------------------------------------------------
Nicki Frank Hinsche, Dr. rer. nat.
Institute of physics - Theoretical physics, Martin-Luther-University Halle-Wittenberg, Von-Seckendorff-Platz 1, Room 1.07 D-06120 Halle/Saale, Germany
Tel.: ++49 345 5525460
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