Phonons and reciprocal space
From ChemWiki
Vibrations
Recall that vibrations are dene as the oscillation (or movement) of atoms in a molecule (or crystal) in periodic motion. In the crystalline case, these periodic vibrations are known as phonons. The simplest approximation to describe this periodic motion (i.e. phonons) is that of the harmonic oscillator that is shown in Fig. 1 and described by Eq. 1.
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 (Eq. 1)
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| Fig. 1: Animation of a simple harmonic oscillator. | Failed to parse (lexing error):
� and Failed to parse (lexing error): is the amplitud and the phase respectively and Failed to parse (lexing error): � is the angular frequency |
