Gapless Fermi Surfaces in Superconducting CeCoIn5?

Abstract

According to [M.A. Tanatar et al., Phys. Rev. Lett. 95, 067002 (2005)], in a multi-band d-wave superconductor CeCoIn5 electrons remain partially uncondensed. Interactions must induce superconducting order on all Fermi surfaces. We calculate specific heat and thermal conductivity in a two band model in presence of defects. Superconductivity originates on one Fermi surface, inducing a smaller gap on the other. Impurities diminish the induced gap and increase the density of states, restoring rapidly the Wiedemann-Franz law for this Fermi surface. Our calculations are in agreement with experiment.

4 pages, 2 figures

References in corpus (20)

• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• Interior Gap Superfluidity
• Avoided Antiferromagnetic Order and Quantum Critical Point in CeCoIn${}_5$
• Orbital dependent superconductivity in Sr_2RuO_4
• Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors
• Electronic Structure, Electron-Phonon Coupling, and Multiband Effects in MgB2
• Effect of magnetic and non-magnetic impurities on highly anisotropic superconductivity
• Ginzburg-Landau theory of vortices in a multi-gap superconductor
• Universal Heat Conduction in YBa_2Cu_3O_6.9
• Inhomogeneous LOFF phase revisited for surface superconductivity
• Breached pairing superfluidity: Possible realization in QCD
• Field-angle Dependence of the Zero-Energy Density of States in the Unconventional Heavy-Fermion Superconductor CeCoIn5
• Conventional mechanisms for "exotic" superconductivity
• Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5}
• Anisotropy of Thermal Conductivity and Possible Signature of the Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn_5
• CeCoIn5 - a quantum critical superfluid
• Breached Superfluidity via P-Wave Coupling
• Exotic ground states and impurities in multiband superconductors

Cited by in corpus (13)

• Exotic Lifshitz transitions in topological materials
• Muon Spin Rotation Measurement of the Magnetic Field Penetration Depth in Ba(Fe0.93 Co0.07)2 As2 : Evidence for Multiple Superconducting Gaps
• Multiband Superconductivity in KFe2As2: Evidence for one Isotropic and several Liliputian Energy Gaps
• Nodal gaps in the nematic superconductor FeSe from heat capacity
• Point-contact spectroscopy in heavy-fermion superconductors
• Andreev reflection and order parameter symmetry in heavy-fermion superconductors: the case of CeCoIn${}_5$
• Superconducting specific heat jump $\Delta C_{\mathrm{el}}\propto T_c^{\beta }(\beta \approx 2)$ for K${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$
• Quantum oscillations and a non-trivial Berry phase in the noncentrosymmetric superconductor BiPd
• Magnetic field-induced gapless state in multiband superconductors
• Field-induced gapless electron pocket in the superconducting vortex phase of YNi2B2C as probed by magnetoacoustic quantum oscillations
• Superconducting gap structure of the 115's revisited
• Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh${}_{0.5}$Ir${}_{0.5}$In${}_5$
• Pressure studies of the quantum critical alloy Ce(0.93)Yb(0.07)CoIn5