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ID 43716
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creator
Hayashi, Yuya
Takai, Shun
Matsubayashi, Kazuyuki
Uwatoko, Yoshiya
Ochiai, Akira
NDC
Physics
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.
description
This work was supported by JSPS KAKENHI Grant Numbers 2430087 and 15K05175.
journal title
Journal of the Physical Society of Japan
volume
Volume 85
issue
Issue 3
start page
034704-1
end page
034704-7
date of issued
2016
publisher
The Physical Society of Japan
一般社団法人日本物理学会
issn
0031-9015
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
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。
relation url
department
Graduate School of Advanced Sciences of Matter