title: Probing the nodal gap in the pressure-induced heavy fermion superconductor CeRhIn5.
abstract: We report field-orientation specific heat studies of the pressure-induced heavy-fermion superconductor CeRhIn5. These experiments provide the momentum-dependent superconducting gap function for the first time in any pressure-induced superconductor. In the coexisting phase of superconductivity and antiferromagnetism, field rotation within the Ce-In plane reveals fourfold modulation in the density of states, which favors a d-wave order parameter and constrains a theory of the interplay between superconductivity and magnetism.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: Tuson
authors.initials: T
authors.lastname: Park
authors.forename: E D
authors.initials: ED
authors.lastname: Bauer
authors.forename: J D
authors.initials: JD
authors.lastname: Thompson