Study of low carrier density heavy fermion Ce$_{3}$Au$_{3}$Sb$_{4}$

ORAL

Abstract

Ce$_{3}$Au$_{3}$Sb$_{4}$ is a narrow gap semiconductor with a well localized Ce$^{3+}$ state. The specific heat measurements, however, show a Kondo impurity like behavior with a large increase of the specific heat coefficient at low temperature, suggesting a heavy fermionic character in this low carrier concentration system. Magnetic susceptibility, resistivity, and specific heat data will be shown for single crystal Ce$_{3}$Au$_{3}$Sb$_{4}$. The dilution study with La substituted on the Ce site will be also presented to further discuss the Kondo effect in this system.

–

Authors

  • Han-Oh Lee

    Department of Physics, University of California, Davis

  • Peter Klavins

    Department of Physics, University of California, Davis, California, 95616

  • Zachary Fisk

    Department of Physics, University of California, Davis, California, 95616

  • Cathie Condron

    Department of Chemistry, University of California, Davis, California, 95616

  • A. D. Christianson

    Department of Physics and Astronomy, University of California, Irvine, California, 92698-4575

  • J. M. Lawrence

    Department of Physics and Astronomy, University of California, Irvine, California, 92698-4575

  • Jason Gardner

    Physics Department, Brookhaven National Laboratory, Upton, New York, 11973-5000,NIST Center for Neutron Research, National Institute, BNL/NIST