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Observation of the Quantum Critical Behavior in the Evolution from Spin-Glass to Intermediate-Valence Behavior in Ce2Cu1−x Co x Si3 Series

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Abstract

In this study, we report the results of electrical resistivity, magnetic susceptibility, and Ce-LIII-edge X-ray absorption spectrum measurements for a solid solution series Ce2Cu1−x Co x Si3. In the series, Ce2CuSi3 exhibits spin-glass behavior, whereas Ce2CoSi3 displays intermediate-valence behavior. We report the direct observation of the evolution from the RKKY interaction prevailing regime to the non-magnetic intermediate-valence regime in this solid solution series. In addition, we find non-Fermi-liquid behavior from the ρ(T) and χ(T) measurements at x=0.4. Based on the data, it is inferred that at this content, the system is located at the vicinity of the quantum critical point of the evolution.

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Acknowledgements

This work was supported by the National Synchrotron Radiation Research Center of ROC and National Science Council of the Republic of China under contract No. NCS-97-2112-M-168-001-MY2.

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Authors and Affiliations

  1. Nano-Technology R&D Center, Kun Shan University, Tainan, Taiwan

    J. J. Lu, T. S. Mo & T. C. Lin

  2. Department of Electrical Engineering, National Chiayi University, Chiayi, Taiwan

    K. J. Gan

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  1. J. J. Lu
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  2. K. J. Gan
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  3. T. S. Mo
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  4. T. C. Lin
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Correspondence to J. J. Lu.

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Lu, J.J., Gan, K.J., Mo, T.S. et al. Observation of the Quantum Critical Behavior in the Evolution from Spin-Glass to Intermediate-Valence Behavior in Ce2Cu1−x Co x Si3 Series. J Supercond Nov Magn 26, 2175–2179 (2013). https://doi.org/10.1007/s10948-012-1811-y

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  • DOI: https://doi.org/10.1007/s10948-012-1811-y

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