Electronic states of CeT2X20 (T:transition metal, X=Zn and Cd)

Yusuke Hirose; Yoshitaka Suzuki; Fuminori Honda; Ruta Kulkarni; Arumugam Thamizhavel; Naomi Kawamura; Masaichiro Mizumaki; Ryohei Simokasa; Kojiro Mimura; Hiroshi Doto; Rikio Settai

doi:10.1063/1.5043138

AIP Advances (Nov 2018)

Electronic states of CeT2X20 (T:transition metal, X=Zn and Cd)

Yusuke Hirose,
Yoshitaka Suzuki,
Fuminori Honda,
Ruta Kulkarni,
Arumugam Thamizhavel,
Naomi Kawamura,
Masaichiro Mizumaki,
Ryohei Simokasa,
Kojiro Mimura,
Hiroshi Doto,
Rikio Settai

Affiliations

Yusuke Hirose: Department of Physics, Niigata University, Niigata 950-218, Japan
Yoshitaka Suzuki: Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
Fuminori Honda: Institute for Materials Research, Tohoku University, Ibaraki 311-1313, Japan
Ruta Kulkarni: Department of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental Research, Mumbai 400-005, India
Arumugam Thamizhavel: Department of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental Research, Mumbai 400-005, India
Naomi Kawamura: Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
Masaichiro Mizumaki: Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
Ryohei Simokasa: Graduate School of Engineering, Osaka Prefecture University, Osaka 599-8531, Japan
Kojiro Mimura: Graduate School of Engineering, Osaka Prefecture University, Osaka 599-8531, Japan
Hiroshi Doto: Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
Rikio Settai: Department of Physics, Niigata University, Niigata 950-218, Japan

DOI: https://doi.org/10.1063/1.5043138
Journal volume & issue: Vol. 8, no. 11
pp. 115017 – 115017-5

Abstract

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The electronic state of single crystals of CeIr2(Zn1−xCdx)20 and CePt2Cd20 has been studied by measuring the electrical resistivity ρ and specific heat C. We found that by substituting Zn with Cd, the lattice parameter expands, and the electronic specific heat coefficient γ and A coefficient, which is T2-term in ρ, are enhanced. Our experimental results reveal that the electronic state of the intermediate valence compound CeIr2Zn20 changes to a moderately heavy fermion state due to the negative chemical pressure. On the other hand, C and ρ of CePt2Cd20 show a clear jump and an abrupt change of slope below 0.3 K, respectively, due to a magnetic transition. The relation between the hybridization strength and Ce valence state has also been investigated by X-ray absorption experiment.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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