e-DMFT Study of Filled Skutterudite CeGe<sub>4</sub>Pt<sub>12</sub> at Finite Temperatures

ORAL

Abstract

We present results of self-consistent embedded-dynamical mean field theory (e-DMFT) calculations on the rare-earth filled skutterudite CeGe4Pt12, with f-electron correlations, across a wide range of temperature. We were able to obtain converged e-DMFT results down to T ~ 15 K. The calculated f-electron self-energy on the imaginary (Matsubara frequency) and real axis, density of states, hybridization, and spectral function collectively suggest the following picture: Curie-Weiss behavior with fluctuating f-electron moments for T > 200K; behavior consistent with Kondo lattice of partially compensated f-electron moments for intermediate T ~ 25K – 100K; Nozieres-type Fermi liquid behavior of the Kondo impurity model for low T ~ 15K and below - a very low Fermi liquid scale. Our results may provide plausible explanation of experimental trends at finite temperatures.

*Work supported in part by the U.S. Department of Energy Grant No. DE-SC0014506 (Widom); ICAM and Gordon and Betty Moore Foundation, Grant No. GBMF5305 (Quader); Computational Materials Science Program, U.S. Department of Energy (Haule).

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Presenters

  • Khandker Quader

    • Physics, Kent State University, Kent, OH 44242
    • Physics, Kent State University, Kent, OH 44242, USA

Authors

  • Khandker Quader

    • Physics, Kent State University, Kent, OH 44242
    • Physics, Kent State University, Kent, OH 44242, USA

  • Gheorghe Pascut

    • MANSID
    • MANSiD Research Center, Stefan Cel Mare University
    • MANSiD Research Center and Faculty of Forestry, Stefan Cel Mare University (USV), Suceava 720229, Romania
    • MANSiD Research Center and Faculty of Forestry, Applied Ecology Laboratory, Stefan Cel Mare University (USV)
    • MANSiD Research Center, Stefan Cel Mare University (USV)

  • Michael Widom

    • Physics, Carnegie-Mellon University, Pittsburgh, PA 15213, USA
    • Carnegie Mellon Univ
    • Department of Physics, Carnegie Mellon University

  • Kristjan Haule

    • Rutgers University, New Brunswick
    • Physics & Astronomy, Rutgers University, Piscataway, NJ 08854, USA
    • Department of Physics and Astronomy, Rutgers University
    • Dept. of Physics and Astronomy, Rutgers University, New Brunswick
    • Department of Physics and Astronomy, Rutgers, The State University of New Jersey