The electrodynamics of correlated metals

✍ Scribed by G. Grüner; W.P. Beyermann

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 486 KB
• Volume: 163
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(90)90193-x

✦ Synopsis

The electrodynamic response of several heavy-fermion materials, such as CeAI,, UPt, and CePd,, is reviewed with particular emphasis on low frequency coherent state effects. A narrow zero-frequency resonance is observed in the conductivity at millimeter-wave frequencies which is a manifestation of strong electron-electron interactions. The renormalized relaxation time, the renormalized plasma frequency (or equivalently the spectral weight in the zero-frequency mode) and the enhanced effective mass are derived from the frequency dependent response. Finally, we discuss the relationship between the electrodynamics and thermodynamics in heavy fermion systems.