Watergate

Based on lectures given at the University of Illinois in 1961, Elementary Excitations in Solids provides a pedagogical introduction to our present view of solids as a system of interacting electrons and ions, with excited states that are best described as a set of coupled elementary excitations, electrons, plasmons, excitons, and phonons. In addition to introducing basic concepts, the author frequently refers to experimental data. For the most part, both the basic theory and the applications discussed deal with the behavior of "simple" metals, such as the alkali metals, rather than the "complicated" metals, such as the transition metals and the rare earths. Problems have been included for most of the chapters.