Anomalous behavior on specific heat and thermoelectric power in wide range of temperatures in CeNi2(Ge1-xSix)2

Michio Takeuchi*, Mayumi Funane, Yosikazu Isikawa, Toshio Mizushima, Takashi Tayama, Tadashi Fukuhara, Tomohiko Kuwai

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

1 被引用数 (Scopus)

抄録

We present magnetic specific heat Cm and thermoelectric power S for CeNi2(Ge1-xSix)2 (x = 0 ∼ 0.4) in a wide range of temperatures above 1 K to 300 K. Both Cm and S show a characteristic broad peak around 100 ∼ 150 K due to the Kondo effect with high Kondo temperature which is comparable to the crystalline electric field. On the other hand, Cm/T and S/T synchronously increase logarithmically at low temperatures on cooling for all x investigated. The anomalous temperature dependence both in Cm/T and S/T at low temperatures is interpreted as non-Fermi-liquid behavior due to the proximity to the quantum critical point for x ≤ 0.1, and due to Kondo disorder for x ≥ 0.3.

本文言語英語
論文番号SA063
ジャーナルJournal of the Physical Society of Japan
80
SUPPL. A
DOI
出版ステータス出版済み - 2011/07

ASJC Scopus 主題領域

  • 物理学および天文学一般

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