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The scaled-invariant Planckian metal and quantum criticality in Ce1−xNdxCoIn5

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  • Yung-Yeh Chang

    (Physics Division, National Center for Theoretical Sciences
    National Yang-Ming Chiao-Tung University)

  • Hechang Lei

    (Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    Renmin University of China)

  • C. Petrovic

    (Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory)

  • Chung-Hou Chung

    (Physics Division, National Center for Theoretical Sciences
    National Yang-Ming Chiao-Tung University)

Abstract

The mysterious Planckian metal state, showing perfect T-linear resistivity associated with universal scattering rate, 1/τ = αkBT/ℏ with α ~ 1, has been observed in the normal state of various strongly correlated superconductors close to a quantum critical point. However, its microscopic origin and link to quantum criticality remains an outstanding open problem. Here, we observe quantum-critical T/B-scaling of the Planckian metal state in resistivity and heat capacity of heavy-electron superconductor Ce1−xNdxCoIn5 in magnetic fields near the edge of antiferromagnetism at the critical doping xc ~ 0.03. We present clear experimental evidences of Kondo hybridization being quantum critical at xc. We provide a generic microscopic mechanism to qualitatively account for this quantum critical Planckian state within the quasi-two dimensional Kondo-Heisenberg lattice model near Kondo breakdown transition. We find α is a non-universal constant and depends inversely on the square of Kondo hybridization strength.

Suggested Citation

  • Yung-Yeh Chang & Hechang Lei & C. Petrovic & Chung-Hou Chung, 2023. "The scaled-invariant Planckian metal and quantum criticality in Ce1−xNdxCoIn5," Nature Communications, Nature, vol. 14(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36194-9
    DOI: 10.1038/s41467-023-36194-9
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    References listed on IDEAS

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    1. S. Licciardello & J. Buhot & J. Lu & J. Ayres & S. Kasahara & Y. Matsuda & T. Shibauchi & N. E. Hussey, 2019. "Electrical resistivity across a nematic quantum critical point," Nature, Nature, vol. 567(7747), pages 213-217, March.
    2. J. Custers & P. Gegenwart & H. Wilhelm & K. Neumaier & Y. Tokiwa & O. Trovarelli & C. Geibel & F. Steglich & C. Pépin & P. Coleman, 2003. "The break-up of heavy electrons at a quantum critical point," Nature, Nature, vol. 424(6948), pages 524-527, July.
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