Kondo effect in CeXc (Xc = S, Se, Te) studied by electrical resistivity measurements under high pressure

Yuya Hayashi, Shun Takai, Takeshi Matsumura, Hiroshi Tanida, Masafumi Sera, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Akira Ochiai

研究成果: Article査読

1 被引用数 (Scopus)

抄録

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 N, 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. N 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 -12.2K=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.

本文言語English
論文番号034704
ジャーナルjournal of the physical society of japan
85
3
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

フィンガープリント 「Kondo effect in C<sub>e</sub>X<sub>c</sub> (X<sub>c</sub> = S, S<sub>e</sub>, T<sub>e</sub>) studied by electrical resistivity measurements under high pressure」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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