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The Advanced Study Institute on 'Elementary Excitations in Solids, Molecules, and Atoms' was held at the University of Antwerp (U.I.A.) from June 18th till June 30th 1973. The In stitute was sponsored by NATO. Co-sponsors were: Agfa-Gevaert N.V. (Mortsel-Belgium), Bell Telephone Mfg. Co. (Antwerp-Belgium), I.B.M. BelgiumN.V. (Brussels-Belgium), the National Science Founda tion (Washington D. C. - U. S .A.) and the Uni versi ty of Antwerp (U. I .A.) . A total of 120 lecturers and participants attended the Institute. Over the last few years, substantial progress has been made in the description of the elementary excitations of the elec tronic and vibrational systems and their interactions. Parallel with this, the experimentalists have obtained outstanding re sults, partly as a result of availability of coherent light sour ces from the far infrared through the visible region, and partly because of the availability of synchrotron radiation sources in the soft X-ray region. The results of today will lead to fur ther progress over the next years. It was the purpose of this NATO Advanced Study Institute to present a state of the art, namely a survey of experiment and theory.
List of contents
Phonons.- Electronic Influence on Lattice Dynamics.- Phonon Calculations in Metals and Insulators.- Excitations in Superfluid Helium.- Hydrodynamic Excitations in Anharmonic Crystals and in Ferromagnets.- Electron-Phonon Interactions.- Electron Interaction with Surface Modes.- Electronic Transitions and Relaxation Phenomena in Polarons.- The Self-Energy Problem in Quantum Dielectrics.- Electrons and Phonons in Narrow Gap Semiconductors.- Light Scattering in Solids.- Resonant Raman Scattering in Semiconductors.- Seminars.- Formalism of an Ab Initio Calculation of Phonon Dispersion Curves in the Hartree-Fock Approximation (Abstract).- Two-Phonon Deformation Potentials, Second Order Raman Scattering, and Superconductivity in Degenerate Semiconductors.- Temperature Dependence of Free Polaron Optical Absorption.- Peierls-Fröhlich Instability and Superconductivity in Linear Chain Crystals.- The Absorption and the Ground State Energy of Free Polarons.- Experimental Studies on Insulators and Metals.- A Review of the Experimental Properties of Insulating Solids.- Optical Absorption and Photoemission Experiments on Metals and Alloys.- Author Index to Part B.- Subject Index to Part B.
