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.
*This work has been supported by NSF DMR-0433560
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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
