2005/12/05 by G. Knebel, D. Aoki, D. Braithwaite +2 · 11 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.74.020501
5 pages, 5 figures
arxiv created 2005/12/05 · openalex publication_date 2006/07/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
New light is shed on the interplay between antiferromagnetism and superconductivity by a detailed study of the phase diagram of CeRhIn5 under high pressure and magnetic field using ac calorimetry. In zero field, the antiferromagnetic order vanishes suddenly above pc^\ensuremath⋆=2\phantom\rule0.3em0exGPa leading to a pure superconducting ground state. An inhomogeneous superconducting phase transition is found below pc^\ensuremath⋆. Above pc^\ensuremath⋆, the application of an external magnetic field H\ensuremath∥ab induces a second transition, which suggests the reentrance of antiferromagnetism, its coexistence with superconductivity, and also the important role of the vortices. This field-induced supplementary state vanishes around the expected quantum critical point, which will occur in the absence of superconductivity.