Doran and Linde review the transient effects produced by shock waves and also observations on a range of physical properties of shocked materials, The comparison of the latter observations with changes produced by quasistatic deformation suggests differences in degree rather than in kind. The transient effects provide a severer test of experimental and theoretical iugenuity covering a great range of techniques lllany as yet by no means fully exploited.
The article by Spector on the theo*T of acoustic phonon-conduction electron interactions offers an excellent systematic introduction to the subject. The basic physics of the interaction through purely electromagnetic, deformation potential, piezoelectric, and magimto-elast,ic couplings is reviewed. The calculation of the conductivity tensor, the absorption coefficient, change of sound velocity, and acousto-electric fieM is presented. The discussion is essentially for electrons in spherical energy bands. The use of the interactions as a probe in tim study of more general Fermi surfaces is touched on in the final section which summarises ~lm uses of the effect as a tool.
The remaining article, by Maradudin, is the second part of an article begun in 0m previous volume on the effects of point defects and disorder on crystal vibrations. The preSent part deals with one phonon impurity induced absorption in ionic and homopolar crystals, the first order Raxaan effect, and various anharmonic effects. The study of localized modes by spin-lattice relaxation, and the surface vibrational properties of clTstal surfaces are also reviewed. The two articles cover a fm~fidable amount of experimental and theoretical work in an active field in a reasonably unffonn way. The article in the present volmne includes many papers published in 1965. It forms an excellent starting point for re'~ling.
Many previous reviews have pointed out the exceptional quality sustained in this series. The volume reviewed here maintMns the standard.