Chapter 95 Light scattering in intermetallic compounds

摘要: Publisher Summary This chapter presents a status report on the progress that has been made in applying light scattering to various rare-earth (R) intermetallic compounds with emphasis Kondo- and intermediate valence-type materials. In this field of research, provides detailed information about localized electronic excitations—such as crystalline electric (CEF) excitations, spin–orbit-split multiplet excitations—and phononic elastic properties. An overview rather diverse features observed by Raman metallic R ranging from purely excitations phonons strongly coupled electron–phonon is presented chapter. The primary interest investigating mixed-valence materials using arose estimate inverse timescale 4f-charge fluctuations inducing volume changes up 15% may be order phonon frequencies. Hence, early experiments intermediate-valence concerned investigation anomalies their relation interaction. Polarized provided an experimental test relative importance different charge deformabilities introduced lattice dynamical model calculations.