[Pw_forum] Electron-phonon coupling

[ma Yanming]

Dear Paolo,

I do not know what is meaning of "w2(nu)" in your code of lambda.f.
what value do I need to input for "w2"?
It is claimed as square omega. 

Best Wishes!

Yanming Ma PhD
Steacie Institute for Molecular Sciences,
National Research Councils of Canada.
100 Sussex
K1A 0R6





>From: Paolo Giannozzi <giannozz at nest.sns.it>
>Reply-To: pw_forum at pwscf.org
>To: pw_forum at pwscf.org
>Subject: Re: [Pw_forum] Electron-phonon coupling
>Date: Wed, 2 Apr 2003 23:20:19 +0200 (CEST)
>
>Hi
>
> > According to 7-th example,  the code is able to
> > calculate \lambda_{nk} (in the example k-point is X).
> > I am calculating it for a number of k-points in the
> > 1/48 part of the BZ for FCC lattice. The origin of the
> > k-points I am using is slightly shifted (so, it is
> > not k=(000)).  I supposed that later \lambda_{nk}
> > could be  integrated using the tetrahedron method.
>
>you do not need any tetrahedron method: you just average over
>the irreducible BZ. You can use gaussian broadening to calculate
>alpha^2F(omega). I am attaching the code I used to sum over q
>(no warranty that it works) and some notes I wrote.
>
>Paolo
>--
>Paolo Giannozzi             e-mail:  giannozz at nest.sns.it
>Scuola Normale Superiore    Phone:   +39/050509412
>Piazza dei Cavalieri 7      Fax:     +39/050509417, 050563513
>I-56126 Pisa, Italy         Office:  Lab. NEST, Via della Faggiola 19
>
><< lambda.f >>
><< e-ph.tex >>


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