Twenty-five years of heavy-fermion superconductivity
Abstract
We discuss first the physical properties of the prototypical heavy-fermion superconductor CeCu 2Si 2 and, second, the relationship of its superconductivity with both a spin-density-wave-type quantum phase transition and a weak valence transition of Ce that occurs at high pressure. We, then, briefly address the isostructural heavy-fermion compound YbRh 2Si 2, displaying a local type of quantum critical behavior which appears to be detrimental to superconductivity.
- Publication:
-
Physica B Condensed Matter
- Pub Date:
- April 2005
- DOI:
- 10.1016/j.physb.2005.01.054
- Bibcode:
- 2005PhyB..359..326S