The Missing Link: Magnetism and Superconductivity

Abstract

The effect of magnetic moments on superconductivity has long been a controversial subject in condensed matter physics. While Matthias and collaborators experimentally demonstrated the destruction of superconductivity in La by the addition of magnetic moments (Gd), it has since been suggested that magnetic fluctuations are in fact responsible for the development of superconducting order in other systems. Currently this debate is focused on several families of unconventional superconductors including high-Tc cuprates, borocarbides as well as heavy fermion systems where magnetism and superconductivity are known to coexist. Here we report a novel aspect of competition and coexistence of these two competing orders in an interesting class of heavy fermion compounds, namely the 1-1-5 series: CeTIn5 where T=Co, Ir, or Rh. Our optical experiments indicate the existence of regions in momentum space where local moments remain unscreened. The extent of these regions in momentum space appears to control both the normal and superconducting state properties in the 1-1-5 family of heavy fermion (HF) superconductors.

6 pages, 2 figures

References in corpus (13)

• Kramers-Kronig constrained variational analysis of optical spectra
• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• Quantum criticality
• A New Heavy-Fermion Superconductor CeIrIn5: Relative of the Cuprates?
• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Field-angle Dependence of the Zero-Energy Density of States in the Unconventional Heavy-Fermion Superconductor CeCoIn5
• Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5}
• Direct observation of quasi-particle band in CeIrIn${}_5$: Angle-resolved photoemission spectroscopy study
• Kondo Scaling in the Optical Response of YbIn_(1-x)Ag_xCu_4
• Optical study of interactions in a d-electron Kondo lattice with ferromagnetism
• Correlation gap in the heavy-fermion antiferromagnet UPd_2Al_3
• Electrodynamics of correlated electron matter
• Heavy fermion fluid in high magnetic fields: an infrared study of CeRu${}_4$Sb${}_{12}$

Cited by in corpus (27)

• Electrodynamics of Correlated Electron Materials
• Modelling the Localized to Itinerant Electronic Transition in the Heavy Fermion System CeIrIn5
• Heavy-electron quantum criticality and single-particle spectroscopy
• Direct observation of how the heavy fermion state develops in CeCoIn5
• Crystal-field and Kondo scale investigation of CeMIn5 (M=Co, Ir and Rh): a combined x-ray absorption and inelastic neutron study
• Correlation between the phase diagram and the crystal-field wave functions of CeRh(1-x)Ir(x)In5
• T=0 heavy fermion quantum critical point as an orbital selective Mott transition
• Determining the crystal-field ground state in rare earth Heavy Fermion materials using soft-x-ray absorption spectroscopy
• Hybridization dynamics in CeCoIn5 revealed by ultrafast optical spectroscopy
• Higher angular momentum Kondo liquids
• Crystal-field ground state of the non-centrosymmetric superconductor CePt3Si: a combined polarized soft X-ray absorption and polarized neutron study
• Heavy-fermion metals with hybridization nodes: Unconventional Fermi liquids and competing phases
• Evolution of ground state wave function in CeCoIn${}_5$ upon Cd or Sn doping
• Infrared properties of heavy-fermions: evolution from weak to strong hybridizations
• Angle dependent quasiparticle weights in correlated metals
• Fermi surface evolution through a heavy fermion superconductor-to-antiferromagnet transition: de Haas-van Alphen effect in Cd-substituted CeCoIn${}_5$
• Unusual metamagnetism in CeIrIn${}_5$
• Nature of the unconventional heavy fermion Kondo state in monolayer CeSiI
• Dimensional trend in CePt2In7, Ce-115 compounds, and CeIn3
• Terahertz Conductivity of the Heavy-Fermion State in CeCoIn5
• Evidence of momentum dependent hybridization in Ce2Co0.8Si3.2
• Hyperfine Couplings as a Probe of Orbital Anisotropy in Heavy Fermion Materials
• Optical spectra of the heavy fermion uniaxial ferromagnet UGe${}_2$
• Contrasting pressure evolutions of $f$ electron hybridized states in CeRhIn${}_5$ and YbNi${}_3$Ga${}_9$: an optical conductivity study
• Anisotropic Kondo pseudo-gap in URu2Si2
• Single crystal growth and physical property characterizations of mixed valent compound YbFe${}_2$Al${}_{10}$
• Charge Carrier Dynamics of the Heavy Fermion Metal CeCoIn${}_5$ Probed by THz Spectroscopy