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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.

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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