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Signatures of Mottness and Hundness in archetypal correlated metals

Author

Listed:
  • Xiaoyu Deng

    (Rutgers University)

  • Katharina M. Stadler

    (Ludwig-Maximilians-Universitat München)

  • Kristjan Haule

    (Rutgers University)

  • Andreas Weichselbaum

    (Ludwig-Maximilians-Universitat München
    Brookhaven National Laboratory)

  • Jan Delft

    (Ludwig-Maximilians-Universitat München)

  • Gabriel Kotliar

    (Rutgers University
    Brookhaven National Laboratory)

Abstract

Physical properties of multi-orbital materials depend not only on the strength of the effective interactions among the valence electrons but also on their type. Strong correlations are caused by either Mott physics that captures the Coulomb repulsion among charges, or Hund physics that aligns the spins in different orbitals. We identify four energy scales marking the onset and the completion of screening in orbital and spin channels. The differences in these scales, which are manifest in the temperature dependence of the local spectrum and of the charge, spin and orbital susceptibilities, provide clear signatures distinguishing Mott and Hund physics. We illustrate these concepts with realistic studies of two archetypal strongly correlated materials, and corroborate the generality of our conclusions with a model Hamiltonian study.

Suggested Citation

  • Xiaoyu Deng & Katharina M. Stadler & Kristjan Haule & Andreas Weichselbaum & Jan Delft & Gabriel Kotliar, 2019. "Signatures of Mottness and Hundness in archetypal correlated metals," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10257-2
    DOI: 10.1038/s41467-019-10257-2
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    Cited by:

    1. Subhasis Samanta & Hwiwoo Park & Chanhyeon Lee & Sungmin Jeon & Hengbo Cui & Yong-Xin Yao & Jungseek Hwang & Kwang-Yong Choi & Heung-Sik Kim, 2024. "Emergence of flat bands and ferromagnetic fluctuations via orbital-selective electron correlations in Mn-based kagome metal," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Eun Kyo Ko & Sungsoo Hahn & Changhee Sohn & Sangmin Lee & Seung-Sup B. Lee & Byungmin Sohn & Jeong Rae Kim & Jaeseok Son & Jeongkeun Song & Youngdo Kim & Donghan Kim & Miyoung Kim & Choong H. Kim & Ch, 2023. "Tuning orbital-selective phase transitions in a two-dimensional Hund’s correlated system," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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