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Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude

From: Takeshi NISHIMATSU <t_nissie@yahoo.co.jp>
To: forum@abinit.org
Subject: Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude
Date: Tue, 18 Aug 2009 21:37:48 +0900 (JST)
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Emmanuel,

You should read a basic textbook on solid state
physics and phonon. Par exemple, CHAPTER 3 of
"Theoretical Solid State Physics, Vol.1: Perfect
Lattices in Equilibrium" by William Jones and
Norman H. March.

> when I compute phonons, for each mode, the atomique displacementvectors'
> coordinates are given
> by complexe numbers (in anaddb.out,since my _PHVEC file is empty whatever
> eivec but
> that'sanother problem). I get that the norm of these complexes are
> thecoordinates of the
> atomique displacementvectors, but I wonder what is the meaning of the
> complexe phaseassociated.
> :

Hint: D(k) and D(-k)

Bonne chance,
--
Takeshi
love && peace && free_software
http://loto.sourceforge.net/feram/ Fast MD program for perovskite-type
ferroelectrics

Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude, Emmanuel Arras, 08/18/2009
- Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude, Takeshi NISHIMATSU, 08/18/2009
  - Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude, Emmanuel Arras, 08/18/2009
    - Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude, Xavier Gonze, 08/18/2009
      - Re: [abinit-forum] phonons atomique displacements, complexe phase and amplitude, Emmanuel Arras, 08/19/2009