Antiferromagnetism and Superconductivity in Cerium based Heavy Fermion Compounds

TL;DR

This paper explores the complex relationship between antiferromagnetism and unconventional superconductivity in Ce-based heavy fermion compounds, highlighting phase diagrams and the potential for mixed pairing states in non-centrosymmetric superconductors.

Contribution

It provides a detailed analysis of the pressure-temperature-magnetic field phase diagrams and discusses the microscopic coexistence of magnetic order and superconductivity in these materials.

Findings

Superconductivity appears at the border of magnetic order.

Microscopic coexistence of magnetic order and superconductivity is observed.

Non-centrosymmetric superconductors may exhibit mixed parity pairing.

Abstract

The study of competing ground states is a central issue in condensed matter physic. In this article we will discuss the interplay of antiferromagnetic order and unconventional superconductivity in Ce based heavy-fermion compounds. In all discussed examples superconductivity appears at the border of magnetic order. Special focus is given on the pressure-temperature-magnetic field phase diagram of CeRhIn5 and CeCoIn5 which allows to discuss microscopic coexistence of magnetic order and superconductivity in detail. A striking point is the similarity of the phase diagram of different classes of strongly correlated systems which is discussed briefly. The recently discovered non-centrosymmetric superconductors will open a new access with the possible mixing of odd and even parity pairing.