Frequency dependent transport in heavy fermion systems

• Published in: Journal of magnetism and magnetic materials Vol. 76; pp. 207 - 212
• Main Authors: Beyermann, W.P., Awasthi, A.M., Carini, J.P., Grüner, G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.1988; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Metals, semimetals and alloys; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Specific materials; Electrical conductivity; Theoretical study; Heavy fermion; Experimental study; Absorptance; Low frequency; Relaxation time; Millimetric wave; Optical properties; Frequency; Renormalization; Coherent state; Fermi liquid
• ISSN: 0304-8853
• DOI: 10.1016/0304-8853(88)90369-1

Frequency dependent conductivity measurements, performed in the millimeter wave spectral range on several heavy fermion materials, are analyzed in terms of a renormalized Drude theory. The experiments indicate an enhanced relaxation time with an enhancement factor approximately the same as that for the thermodynamic quantities. The crossover from the renormalized to unrenormalized response with increasing frequency is discussed, and a comparison is made with the various models of transport in highly correlated Fermi liquids.