Signatures of Mottness and Hundness in archetypal correlated metals

Deng, Xiaoyu; Stadler, Katharina M.; Haule, Kristjan; Weichselbaum, Andreas; von Delft, Jan; Kotliar, Gabriel

doi:10.1038/s41467-019-10257-2

Signatures of Mottness and Hundness in archetypal correlated metals

Journal Article · Thu Jun 20 00:00:00 EDT 2019 · Nature Communications

DOI:https://doi.org/10.1038/s41467-019-10257-2· OSTI ID:1624155

^[1]; Stadler, Katharina M. ^[2]; Haule, Kristjan ^[3]; Weichselbaum, Andreas ^[4]; ^[2]; Kotliar, Gabriel ^[3]

Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy; DOE/OSTI
Ludwig Maximilian Univ. of Munich, Munich (Germany). Physics Dept. Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience
Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
Ludwig Maximilian Univ. of Munich, Munich (Germany). Physics Dept. Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

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.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0012704

OSTI ID:: 1624155

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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