Anisotropic hybridization in a new Kondo lattice compound CeCoInGa${}_3$

Abstract

We report a detailed and comparative study of the single crystal CeCoInGa${}_3$ in both experiment and theory. Resistivity measurements reveal the typical behavior of Kondo lattice with the onset temperature of coherence, $T^{\ast }\approx 50$K. The magnetic specific heat can be well fitted using a spin-fluctuation model at low temperatures, yielding a large Sommerfeld coefficient, $\gamma \approx 172$mJ/mol K${}^2$ at 6 K, suggesting that this is a heavy-fermion compound with a pronounced coherence effect. The magnetic susceptibility exhibits a broad field-independent peak at $T_{\chi }$ and shows an obvious anisotropy within the $bc$ plane, reflecting the anisotropy of the coherence effect at high temperatures. These are compared with strongly correlated calculations combining first-principles band structure calculations and dynamical mean-field theory. Our results confirm the onset of coherence at about 50 K and reveal a similar anisotropy in the hybridization gap, pointing to a close connection between the hybridization strength of the low-temperature Fermi-liquid state and the high-temperature coherence effect.

arXiv comment7 pages, 6 figures

References in corpus (18)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Topological Kondo Insulators
• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• How do Fermi liquids get heavy and die?
• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Modelling the Localized to Itinerant Electronic Transition in the Heavy Fermion System CeIrIn5
• Universal Behavior in Heavy Electron Materials
• Emergent states in heavy electron materials
• β-YbAlB4: a critical nodal metal
• Band dependent inter-layer $f$-electron hybridization in CeRhIn${}_5$
• Two-Fluid Model for Heavy Electron Physics
• Pressure-induced quantum phase transitions in topological insulator YbB6
• Bandstructure meets many-body theory: The LDA+DMFT method
• Toward a New Microscopic Framework for Kondo Lattice Materials
• Localization of strongly correlated electrons as Jahn-Teller polarons in manganites
• Superconductivity in pressurized CeRhGe3 and related non-centrosymmetric compounds
• Magnetic properties of single-crystalline CeCuGa3