Heat transport study of field-tuned quantum criticality in CeIrIn5

Abstract

The in-plane electrical resistivity, rho, and thermal conductivity, kappa, of the heavy-fermion superconductor CeIrIn5 were measured down to 40mK in magnetic fields up to 11 T applied along the c axis. For all fields above Hc2=4T of filamentary superconductivity, we find that the ratio of heat and charge conductivities in the T to 0 limit obeys the Wiedemann-Franz law, kappa/T=L0/rho, where L0 = 2.45*10^-8 WOhmK^-2 is the Sommerfeld value of the Lorenz number. The temperature-dependent parts of both the electrical and thermal resistivity,w = T/L0 kappa, follow the functional dependence expected for the Fermi liquid theory of metals with rho - rho_0 = AT^2, w - w_0 = BT^2, with rho0 = w0 and B ~ 2A. The coefficient B does not show a significant field dependence even upon approaching Hc2 = 0.4 T of the bulk superconducting state. The weak response to the magnetic field is in stark contrast with the behavior found in the closely related CeCoIn5, in which the field-tuned quantum critical point coincides with Hc2. The value of the electron-electron mass enhancement, as judged by the A and B coefficients, is about one order of magnitude reduced in CeIrIn5 as compared to CeCoIn5 (in spite of the fact that the zero field gamma_0 in CeIrIn5 is twice as large as gamma_0 in CeCoIn5), which suggests that the material is significantly farther away from the magnetic quantum critical point at bulk Hc2 and at all of the studied fields. A suppressed Kadowaki-Woods ratio in CeIrIn5 compared to CeCoIn5 suggests a notably more localized nature of f electrons in the compound.

arXiv comment7 pages, 3 figures

References in corpus (35)

• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• The break up of heavy electrons at a quantum critical point
• A New Heavy-Fermion Superconductor CeIrIn5: Relative of the Cuprates?
• Magnetic-Field Induced Quantum Critical Point in YbRh${}_2$Si${}_2$
• Field-Induced Quantum Critical Point in CeCoIn5
• Superconductivity and Quantum Criticality in CeCoIn_5
• Avoided Antiferromagnetic Order and Quantum Critical Point in CeCoIn${}_5$
• Quantum criticality and nodal superconductivity in the FeAs-based superconductor KFe2As2
• Imaging Cooper Pairing of Heavy Fermions in CeCoIn5
• Visualizing Nodal Heavy Fermion Superconductivity in CeCoIn5
• Reversible Tuning of the Heavy Fermion Ground State in CeCoIn${}_5$
• Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
• Coexistence of magnetism and superconductivity in CeRh1-xIrxIn5
• Coexistence of antiferromagnetism and superconductivity in CeRhIn5 under high pressure and magnetic field
• Sign reversal of field-angle resolved heat capacity oscillations in a heavy fermion superconductor CeCoIn${}_5$ and $d_{x^2-y^2}$ pairing symmetry
• 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}
• Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5
• Field-Tuned Quantum Critical Point in CeCoIn${}_5$ Near the Superconducting Upper Critical Field
• Magnetotransport in nearly antiferromagnetic metals
• Quantum critical scaling at the edge of Fermi liquid stability in a cuprate superconductor
• Heat Transport as a Probe of Electron Scattering by Spin Fluctuations: the Case of Antiferromagnetic CeRhIn5
• On the origin of the zero-resistance anomaly in heavy fermion superconducting Ir: a clue from magnetic field and Rh-doping studies
• Antiferromagnetism and Superconductivity in Cerium based Heavy Fermion Compounds
• Calculated de Haas-van Alphen quantities of Ce(M)In5 (M=Co, Rh, and Ir) compounds
• c-axis magnetotransport in CeCoIn${}_5$
• Non-Fermi Liquid behavior in CeIrIn${}_5$ near a metamagnetic transition
• Hybrid gap structure in the heavy-fermion superconductor CeIrIn${}_5$
• Structural investigations of CeIrIn${}_5$ and CeCoIn${}_5$ on macroscopic and atomic length scales
• CeIrIn5: Superconductivity on a Magnetic Instability
• Ambient-pressure bulk superconductivity deep in the magnetic state of CeRhIn5
• A precursor state to unconventional superconductivity in CeIrIn${}_5$
• Unusual metamagnetism in CeIrIn${}_5$
• The precursor state to superconductivity in CeIrIn${}_5$: Unusual scaling of magnetotransport
• Anisotropy of Electrical Transport and Superconductivity in Metal Chains of Nb2Se3

Cited by in corpus (2)

• Quantum critical quasiparticle scattering within the superconducting state of CeCoIn5
• Sub-Phases in the Superconducting State of CeIrIn${}_5$ Revealed by Low Temperature $c$-axis Heat Transport