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

[nicvok]

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

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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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