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Evolution of the Kondo lattice and non-Fermi liquid excitations in a heavy-fermion metal

Author

Listed:
  • S. Seiro

    (Max Planck Institute for Chemical Physics of Solids
    IFW-Dresden)

  • L. Jiao

    (Max Planck Institute for Chemical Physics of Solids)

  • S. Kirchner

    (Zhejiang University)

  • S. Hartmann

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • S. Friedemann

    (University of Bristol)

  • C. Krellner

    (Goethe-University Frankfurt)

  • C. Geibel

    (Max Planck Institute for Chemical Physics of Solids)

  • Q. Si

    (Rice University)

  • F. Steglich

    (Max Planck Institute for Chemical Physics of Solids)

  • S. Wirth

    (Max Planck Institute for Chemical Physics of Solids)

Abstract

Strong electron correlations can give rise to extraordinary properties of metals with renormalized Landau quasiparticles. Near a quantum critical point, these quasiparticles can be destroyed and non-Fermi liquid behavior ensues. YbRh2Si2 is a prototypical correlated metal exhibiting the formation of quasiparticle and Kondo lattice coherence, as well as quasiparticle destruction at a field-induced quantum critical point. Here we show how, upon lowering the temperature, Kondo lattice coherence develops at zero field and finally gives way to non-Fermi liquid electronic excitations. By measuring the single-particle excitations through scanning tunneling spectroscopy, we find the Kondo lattice peak displays a non-trivial temperature dependence with a strong increase around 3.3 K. At 0.3 K and with applied magnetic field, the width of this peak is minimized in the quantum critical regime. Our results demonstrate that the lattice Kondo correlations have to be sufficiently developed before quantum criticality can set in.

Suggested Citation

  • S. Seiro & L. Jiao & S. Kirchner & S. Hartmann & S. Friedemann & C. Krellner & C. Geibel & Q. Si & F. Steglich & S. Wirth, 2018. "Evolution of the Kondo lattice and non-Fermi liquid excitations in a heavy-fermion metal," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05801-5
    DOI: 10.1038/s41467-018-05801-5
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    Cited by:

    1. Kai Fan & Heng Jin & Bing Huang & Guijing Duan & Rong Yu & Zhen-Yu Liu & Hui-Nan Xia & Li-Si Liu & Yao Zhang & Tao Xie & Qiao-Yin Tang & Gang Chen & Wen-Hao Zhang & F. C. Chen & X. Luo & W. J. Lu & Y., 2024. "Artificial superconducting Kondo lattice in a van der Waals heterostructure," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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