Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5}

Abstract

Thermal conductivity and specific heat were measured in the superconducting state of the heavy fermion material Ce_{1-x}La_{x}CoIn_{5}. With increasing impurity concentration x, the suppression of T_{c} is accompanied by the increase in the residual electronic specific heat expected of a d-wave superconductor, but it occurs in parallel with a decrease in residual electronic thermal conductivity. This contrasting behavior reveals the presence of uncondensed electrons coexisting with nodal quasiparticles. An extreme multiband scenario is proposed, with a d-wave superconducting gap on the heavy-electron sheets of the Fermi surface and a negligible gap on the light, three-dimensional pockets.

4 pages, 3 figures

References in corpus (25)

• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• Unconventional superconductivity in CeIrIn${}_5$ and CeCoIn${}_5$: Specific heat and thermal conductivity studies
• Interior Gap Superfluidity
• Field-Induced Quantum Critical Point in CeCoIn5
• Superconductivity and Quantum Criticality in CeCoIn_5
• Avoided Antiferromagnetic Order and Quantum Critical Point in CeCoIn${}_5$
• Impurity-Induced Quasiparticle Transport and Universal Limit Wiedemann-Franz Violation in d-Wave Superconductors
• Orbital dependent superconductivity in Sr_2RuO_4
• Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors
• Heat Conduction in the Vortex State of NbSe_2: Evidence for Multi-Band Superconductivity
• Universal Heat Conduction in YBa_2Cu_3O_6.9
• Properties of the superconducting state in a two-band model
• Field-angle Dependence of the Zero-Energy Density of States in the Unconventional Heavy-Fermion Superconductor CeCoIn5
• Determination of the Superconducting Gap Structure in All Bands of the Spin-Triplet Superconductor Sr2RuO4
• Intersite coupling effects in a Kondo lattice
• Anisotropy of Thermal Conductivity and Possible Signature of the Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn_5
• Universal Heat Transport in Sr2RuO4
• Spectroscopic Evidence for Multiple Order Parameter Components in the Heavy Fermion Superconductor CeCoIn_5
• Specific Heat of CeRhIn5: Pressure-Driven Evolution of the Ground State from Antiferromagnetism to Superconductivity
• Effects of La substitution on superconducting state of CeCoIn5
• The Origin of Anomalous Low-Temperature Downturns in the Thermal Conductivity of Cuprates
• CeCoIn5 - a quantum critical superfluid
• Effect of controlled disorder on quasiparticle thermal transport in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$
• Impurities and orbital dependent superconductivity in Sr_2RuO_4

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• Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5
• Vertical line nodes in the superconducting gap structure of Sr2RuO4
• Muon Spin Rotation Measurement of the Magnetic Field Penetration Depth in Ba(Fe0.93 Co0.07)2 As2 : Evidence for Multiple Superconducting Gaps
• Incoherent non-Fermi liquid scattering in a Kondo lattice
• Observation of Spin Susceptibility Enhancement in the Possible FFLO State in CeCoIn${}_5$
• Direct evidence for Cooper pairing without a spectral gap in a disordered superconductor above $T_C$
• The Missing Link: Magnetism and Superconductivity
• Curie law, entropy excess, and superconductivity in heavy fermion metals and other strongly interacting Fermi liquids
• Thermal conductivity evidence for d_{x^2-y^2} pairing symmetry in the heavy-fermion CeIrIn5 superconductor
• Electronic inhomogeneity in a Kondo lattice
• Field Dependent Coherence Length in the Superclean, High-Kappa Superconductor CeCoIn5
• Nodal quasiparticle dynamics in the heavy fermion superconductor CeCoIn5 revealed by precision microwave spectroscopy
• Robust Upward Dispersion of the Neutron Spin Resonance in the Heavy Fermion Superconductor Ce${}_{1-x}$Yb${}_x$CoIn${}_5$
• Evolution of the superconducting energy gap structure concomitant with Fermi surface reconstruction in the heavy-fermion superconductor CeCoIn5
• Isotropic three-dimensional gap in the iron-arsenide superconductor LiFeAs from directional heat transport measurements
• Point-contact spectroscopy in heavy-fermion superconductors
• Andreev reflection and order parameter symmetry in heavy-fermion superconductors: the case of CeCoIn${}_5$
• Multiple nodeless superconducting gaps in optimally-doped SrTi${}_{1-x}$Nb${}_x$O${}_3$
• Conventional s-wave superconductivity in BiS2-based NdO0.71F0.29BiS2 revealed by thermal transport measurements
• Majorana Flat Bands in s-Wave Gapless Topological Superconductors
• Field Dependence of the Ground State in the Exotic Superconductor CeCoIn${}_5$: a Nuclear Magnetic Resonance Investigation
• Hybrid gap structure in the heavy-fermion superconductor CeIrIn${}_5$
• Ambient-pressure bulk superconductivity deep in the magnetic state of CeRhIn5
• Dilution effects in spin 7/2 systems. The case of the antiferromagnet GdRhIn${}_5$
• Gapless Fermi Surfaces in Superconducting CeCoIn5?
• Angular Dependent Torque Measurements on CeCoIn${}_5$ Single Crystals
• From Ising resonant fluctuations to static uniaxial order in antiferromagnetic and weakly superconducting CeCo(In${}_{1-x}$Hg${}_x$)${}_5$ ($x$=0.01)
• Asymmetric superconductivity in metallic systems
• Pairing Symmetry of CeCoIn${}_5$ Detected by In-plane Torque Measurements
• Phase solitons and subgap excitations in two-band superconductors
• Magnetic field-induced gapless state in multiband superconductors
• Interplane and intraplane heat transport in quasi two-dimensional nodal superconductors
• Superconducting gap structure of the 115's revisited
• Nonlinear current response of one- and two-band superconductors
• Upper critical field of CeCoIn5
• NMR relaxation time in a clean two-band superconductor
• Landau Renormalizations of Superfluid density in Heavy Fermion Superconductor CeCoIn5
• Helical states and solitons in noncentrosymmetric superconductors
• Universal Heat Conduction in Ce1-xYbxCoIn5: Evidence for Robust Nodal d-wave Superconducting Gap
• Quantum critical quasiparticle scattering within the superconducting state of CeCoIn5
• Nonmagnetic impurity resonance states as a test of superconducting pairing symmetry in CeCoIn${}_5$
• Electron transmission in normal/heavy-fermion superconductor junctions
• Low temperature specific heat and thermal conductivity in superconducting UTe2
• Field-induced quantum critical point and nodal superconductivity in the heavy-fermion superconductor Ce2PdIn8
• Evolution of the spin resonance of CeCoIn${}_5$ as a function of magnetic field and La substitution
• Point-contact Andreev reflection spectroscopy of heavy-fermion-metal/superconductor junctions
• Heat transport study of field-tuned quantum criticality in CeIrIn5
• Nuclear Magnetic Resonance in Low-Symmetry Superconductors
• Josephson effect in $CeCoI{n}_5$ microbridges as seen via quantum interferometry
• Pressure studies of the quantum critical alloy Ce(0.93)Yb(0.07)CoIn5
• Normal Fermi Surface in the Nodal Superconductor CeCoIn${}_5$ Revealed via Thermal Conductivity
• Sub-Phases in the Superconducting State of CeIrIn${}_5$ Revealed by Low Temperature $c$-axis Heat Transport
• Universal heat transport in a heavy-fermion superconductor
• Breached pair superfluidity: a brief review