This volume contains of the proceedings of the CECAM {Centre
d'Etudes de Calcul Atomique et Moleculaire} workshop on "Ab Initio
Calculation of Phonon Spectra" which took place at the campus of
the University of Antwerpen (Universitaire Instelling Antwerpen) on
June 4 and 5, 1981. This workshop was sponsored by the
Universitaire Instelling Antwerpen, by the Belgian "Nationaal Fonds
voor Weten- schappelijk Onderzoek" and the Belgian Ministry of
Education and Cultural Affairs. Although the calculation of phonon
spectra in a solid has long been known to solid state physicists,
it is only in the last decade that a macroscopic theory which
treats the response of the electrons to the vibrations of the ions
has been developed in a successful way. In the case of
semiconductors numerical calculations of phonon frequencies were
not performed until very recently due to the complex- ity of the
problem. The correct treatment of the electron in the crystal has
also led to an investigation of electron-phonon inter- action,
including many body effects. Success has been achieved in the
calculation of phonon anomalies and the coupling parameters in
transition metals. In the case of surfaces the conductions for the
appearance of electronic instabilities and the coupling of the
resulting charge density wave to the lattice have been studied.
General
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