Magnetism and superconductivity of heavy fermion matter

TL;DR

This paper reviews the complex relationship between magnetism and unconventional superconductivity in heavy fermion materials, highlighting recent experimental findings and the coexistence or competition of these phenomena in various compounds.

Contribution

It provides a comprehensive overview of the mechanisms and experimental cases of magnetism and superconductivity interplay specifically in heavy fermion systems.

Findings

Superconductivity emerges in strong itinerant ferromagnets UGe2 and URhGe.

Coexistence or competition of antiferromagnetism and superconductivity observed in CeIn3 and CeCoIn5.

Heavy fermion behavior results from local and intersite mass enhancement mechanisms.

Abstract

The interplay of magnetism and unconventional superconductivity (d singlet wave or p triplet wave) in strongly correlated electronic system (SCES) is discussed with recent examples found in heavy fermion compounds. A short presentation is given on the formation of the heavy quasiparticle with the two sources of a local and intersite enhancement for the effective mass. Two cases of the coexistence or repulsion of antiferromagnetism and superconductivity are given with CeIn3 and CeCoIn5. A spectacular example is the emergence of superconductivity in relatively strong itinerant ferromagnets UGe2 and URhGe. The impact of heavy fermion matter among other SCES as organic conductor or high Tc oxide is briefly pointed out.