The heavy-fermion compound UPt 3 is the first compelling example of a superconductor with
an order parameter of unconventional symmetry. To this day, it is the only unambiguous …

This review discusses the heavy-electron compounds and related materials from the
perspective of their electrodynamic response. The investigation of the electrodynamic …

The heavy fermion semiconductors, or Kondo insulators, are very narrow gap
semiconductors in which the properties show unusual temperature dependencies. We shall …

The absence of resistivity saturation in many strongly correlated metals, including the high-
temperature superconductors, is critically examined from the viewpoint of optical conductivity …

Models of superconductivity in unconventional materials can be experimentally
differentiated by the predictions they make for the symmetries of the superconducting order …

We have measured the electrodynamic response in the metallic state of three highly
anisotropic conductors,(TMTSF) 2 X, where X= PF 6, AsF 6, or ClO 4, and TMTSF is the …

Over the past 35 years, research on unconventional superconductivity in heavy-fermion
systems has evolved from the surprising observations of unprecedented superconducting …

The reflectivity of the itinerant ferromagnet SrRuO 3 has been measured between 50 and 25
000 cm− 1 at temperatures ranging from 40 to 300 K, and used to obtain conductivity …

We report the results of optical studies of new heavy fermion compounds YbFe 4 Sb 12 and
CeRu 4 Sb 12. We show that these compounds, as well as several other heavy fermion …

By now more than 100 years passed since Paul Drude suggested his highly acclaimed
model of electronic transport. In the form advanced by A. Sommerfeld, the Drude model is …