Evidence for Coexistence of Bulk Superconductivity and Itinerant Antiferromagnetism in the Heavy Fermion System CeCo(In${}_{1-x}$Cd${}_x$)${}_5$

Abstract

In the generic phase diagram of heavy fermion systems, tuning an external parameter such as hydrostatic or chemical pressure modifies the superconducting transition temperature. The superconducting phase forms a dome in the temperature-tuning parameter phase diagram, which is associated with a maximum of the superconducting pairing interaction. Proximity to antiferromagnetism suggests a relation between the disappearance of antiferromagnetic order and superconductivity. We combine muon spin rotation, neutron scattering, and x-ray absorption spectroscopy techniques to gain access to the magnetic and electronic structure of CeCo(In${}_{1-x}$Cd${}_x$)${}_5$ at different time scales. Different magnetic structures are obtained that indicate a magnetic order of itinerant character, coexisting with bulk superconductivity. The suppression of the antiferromagnetic order appears to be driven by a modification of the bandwidth/carrier concentration, implying that the electronic structure and consequently the interplay of superconductivity and magnetism is strongly affected by hydrostatic and chemical pressure.

Article + Supplementary information 33 pages, 13 figures

References in corpus (18)

• Visualizing heavy fermions emerging in a quantum critical Kondo lattice
• Imaging Cooper Pairing of Heavy Fermions in CeCoIn5
• Reversible Tuning of the Heavy Fermion Ground State in CeCoIn${}_5$
• Interacting Antiferromagnetic Droplets in Quantum Critical CeCoIn_5
• Roles of Critical Valence Fluctuations in Ce- and Yb-Based Heavy Fermion Metals
• Magnetic structure of Cd-doped CeCoIn5
• Crystal-field and Kondo scale investigation of CeMIn5 (M=Co, Ir and Rh): a combined x-ray absorption and inelastic neutron study
• Is the Mott transition relevant to f-electron metals ?
• Disorder in a Quantum Critical Superconductor
• Pressure Study of Quantum Criticality in CeCoIn5
• Towards the identification of a quantum critical line in the (p, B) phase diagram of CeCoIn5
• Fermi Surface Reconstruction in CeRh${}_{1-x}$Co${}_x$In${}_5$
• Competition between unconventional superconductivity and incommensurate antiferromagnetic order in CeRh1-xCoxIn5
• Magnetic order in Ce0.95Nd0.05CoIn5: the Q-phase at zero magnetic field
• Yb Valence Change in (Ce,Yb)CoIn5 from spectroscopy and bulk properties
• Behavior of the Quantum Critical Point and the Fermi-liquid Domain in the Heavy Fermion Superconductor CeCoIn5 studied by resistivity
• Possible Evolution of Antiferromagnetism in Zn-Doped Heavy-Fermion Superconductor CeCoIn5
• Strong pressure dependence of the magnetic penetration depth in single crystals of the heavy fermion superconductor CeCoIn5 studied by muon spin rotation

Cited by in corpus (5)

• Quantitative study of the f occupation in CeMIn5 and other cerium compounds with hard x-rays
• Coexistence of local magnetism and superconductivity in the heavy-fermion CeRh${}_2$As${}_2$ revealed by $\mu$SR studies
• Quasiparticle interference of heavy fermions in resonant X-ray scattering
• Magnetic structure of Cd-doped CeIrIn${}_5$
• Kondo lattice excitation observed using resonant inelastic X-ray scattering at the Yb $M_5$ edge