Anomalous Behavior on Specific Heat and Thermoelectric Power in Wide Range of Temperatures in CeNi2(Ge1-xSix)(2)

作者：Takeuchi Michio^*; Funane Mayumi; Isikawa Yosikazu; Mizushima Toshio; Tayama Takashi; Fukuhara Tadashi; Kuwai Tomohiko

来源：Journal of the Physical Society of Japan, 2011, 80: SA063.

DOI：10.1143/JPSJS.80SA.SA063

• non Fermi liquid
• Kondo disorder
• specific heat
• thermoelectric power

We present magnetic specific heat C-m and thermoelectric power S for CeNi2(Ge1-xSix)(2) (x = 0 similar to 0.4) in a wide range of temperatures above 1 K to 300 K. Both C-m and S show a characteristic broad peak around 100 similar to 150 K due to the Kondo effect with high Kondo temperature which is comparable to the crystalline electric field. On the other hand, C-m/T and SIT synchronously increase logarithmically at low temperatures on cooling for all x investigated. The anomalous temperature dependence both in C-m/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.

• 出版日期2011-7