Single-Site Non-Fermi-Liquid Behaviors in a Diluted 4f^{2} System Y_{1-x}Pr_{x}Ir_{2}Zn_{20}.
Single-Site Non-Fermi-Liquid Behaviors in a Diluted 4f^{2} System Y_{1-x}Pr_{x}Ir_{2}Zn_{20}.
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DOI：
10.1103/physrevlett.121.077206
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发表时间：
2018-05
影响因子：
8.6
通讯作者：
Yu Yamane;T. Onimaru;K. Wakiya;K. Matsumoto;K. Umeo;T. Takabatake
中科院分区：
文献类型：
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作者：
Yu Yamane;T. Onimaru;K. Wakiya;K. Matsumoto;K. Umeo;T. Takabatake
本文测量了稀释4f^{2}系统Y（Pr）Ir_{2}Zn_{20}的电阻率ρ（T）和比热C（T）。在非费米液体（NFL）行为的特征温度T_{0}下，Pr离子的ρ和磁比热C_{m}都与T/T_{0}成良好的比例关系。在强耦合极限下，ρ和Cm/T的温度依赖性与双通道Kondo模型预测的NFL行为一致.因此，我们推断观察到的NFL行为是由于4f^{2}态与多通道传导电子的杂化引起的单点四极近藤效应。
Electrical resistivity ρ(T) and specific heat C(T) measurements have been made on the diluted 4f^{2} system Y(Pr)Ir_{2}Zn_{20}. Both data of ρ and magnetic specific heat C_{m} per Pr ion are well scaled as a function of T/T_{0}, where T_{0} is a characteristic temperature of non-Fermi-liquid (NFL) behaviors. Furthermore, the temperature dependences of ρ and C_{m}/T agree with the NFL behaviors predicted by the two-channel Kondo model for the strong coupling limit. Therefore, we infer that the observed NFL behaviors result from the single-site quadrupole Kondo effect due to the hybridization of the 4f^{2} states with multichannel conduction electrons.