Kondo Effect in CeXc (Xc=S, Se, Te) Studied by Electrical Resistivity Measurements under High Pressure

Journal of the Physical Society of Japan Volume 85 Issue 3 Page 034704-1-034704-7 published_at 2016
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Title ( eng )
Kondo Effect in CeXc (Xc=S, Se, Te) Studied by Electrical Resistivity Measurements under High Pressure
Creator
Hayashi Yuya
Takai Shun
Matsubayashi Kazuyuki
Uwatoko Yoshiya
Ochiai Akira
Source Title
Journal of the Physical Society of Japan
Volume 85
Issue 3
Start Page 034704-1
End Page 034704-7
Abstract
We have measured the electrical resistivity of cerium monochalcogenides, CeS, CeSe, and CeTe, under high pressures of up to 8 GPa. The pressure dependences of the antiferromagnetic ordering temperature TN, crystal field splitting, and the ln T anomaly of the Kondo effect have been studied to cover the entire region from the magnetic ordering regime at low pressure to the Fermi liquid regime at high pressure. TN initially increases with increasing pressure, and starts to decrease at high pressure as expected from Doniach’s diagram. Simultaneously, the ln T behavior in the resistivity is enhanced, indicating the enhancement of the Kondo effect by pressure. It is also characteristic of CeXc that the crystal field splitting rapidly decreases at a common rate of -12:2 K/GPa. This leads to the increase in the degeneracy of the f state and the further enhancement of the Kondo effect. It is shown that the pressure-dependent degeneracy of the f state is a key factor for understanding the pressure dependence of TN, the Kondo effect, magnetoresistance, and the peak structure in the temperature dependence of resistivity.
Descriptions
This work was supported by JSPS KAKENHI Grant Numbers 2430087 and 15K05175.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
The Physical Society of Japan
一般社団法人日本物理学会
Date of Issued 2016
Rights
Copyright (c) 2016 The Physical Society of Japan
Copyright (c) 2016 一般社団法人日本物理学会
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 0031-9015
[NCID] AA00704814
[DOI] 10.7566/JPSJ.85.034704
[DOI] http://dx.doi.org/10.7566/JPSJ.85.034704