title: Coupled superconducting and magnetic order in CeCoIn5.
abstract: Strong magnetic fluctuations can provide a coupling mechanism for electrons that leads to unconventional superconductivity. Magnetic order and superconductivity have been found to coexist in a number of magnetically mediated superconductors, but these order parameters generally compete. We report that close to the upper critical field, CeCoIn5 adopts a multicomponent ground state that simultaneously carries cooperating magnetic and superconducting orders. Suppressing superconductivity in a first-order transition at the upper critical field leads to the simultaneous collapse of the magnetic order, showing that superconductivity is necessary for the magnetic order. A symmetry analysis of the coupling between the magnetic order and the superconducting gap function suggests a form of superconductivity that is associated with a nonvanishing momentum.
authors: Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
authors: M
authors: M
authors: Kenzelmann
authors: T
authors: T
authors: Strässle
authors: C
authors: C
authors: Niedermayer
authors: M
authors: M
authors: Sigrist
authors: B
authors: B
authors: Padmanabhan
authors: M
authors: M
authors: Zolliker
authors: A D
authors: AD
authors: Bianchi
authors: R
authors: R
authors: Movshovich
authors: E D
authors: ED
authors: Bauer
authors: J L
authors: JL
authors: Sarrao
authors: J D
authors: JD
authors: Thompson