Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-11-27
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 7 figures, to be published in Kotai Butsuri, in Japanese
Scientific paper
We give a review of recent results on the heavy fermion superconductor CeRhIn$_5$ which presents ideal conditions to study the interplay of antiferromagnetism and superconductivity. The main results are the appearance of domains of microscopic coexistence of antiferromagnetism and superconductivity under both, pressure and magnetic field scans. At zero magnetic field, under pressure coexistence appears from the onset of pressure induced superconductivity up to the critical pressure $p_c^\star$ where antiferrmognetism disappears abruptly. Under magnetic field, re-entrance of magnetic order inside the superconducting state occurs in the pressure range from $p_c^\star$ up to $p_c$. The antiferromagnetic quantum critical point is hidden by the onset of superconductivity. A striking point is the similarity of the phase diagram of CeRhIn$_5$ and that of the high $T_c$ cuprate superconductors where for the cuprates the carrier concentration replaces the pressure. Both systems are characterized by: hidden magnetic quantum criticality, field reentrance of magnetism and the strong link to a Fermi surface instability.
Aoki Dai
Flouquet Jacques
Knebel Georg
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