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Probing the nodal gap in the pressure-induced heavy fermion superconductor CeRhIn5
Tuson Park1, E D Bauer, J D Thompson
1Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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.
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