Signatures of Mottness and Hundness in archetypal correlated metals
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.
- Authors:
-
[1];
[2];
- 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
- 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.
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1624155
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Science & Technology - Other Topics
Citation Formats
Deng, Xiaoyu, Stadler, Katharina M., Haule, Kristjan, Weichselbaum, Andreas, von Delft, Jan, and Kotliar, Gabriel. Signatures of Mottness and Hundness in archetypal correlated metals. United States: N. p., 2019.
Web. doi:10.1038/s41467-019-10257-2.
Deng, Xiaoyu, Stadler, Katharina M., Haule, Kristjan, Weichselbaum, Andreas, von Delft, Jan, & Kotliar, Gabriel. Signatures of Mottness and Hundness in archetypal correlated metals. United States. https://doi.org/10.1038/s41467-019-10257-2
Deng, Xiaoyu, Stadler, Katharina M., Haule, Kristjan, Weichselbaum, Andreas, von Delft, Jan, and Kotliar, Gabriel. Thu .
"Signatures of Mottness and Hundness in archetypal correlated metals". United States. https://doi.org/10.1038/s41467-019-10257-2. https://www.osti.gov/servlets/purl/1624155.
@article{osti_1624155,
title = {Signatures of Mottness and Hundness in archetypal correlated metals},
author = {Deng, Xiaoyu and Stadler, Katharina M. and Haule, Kristjan and Weichselbaum, Andreas and von Delft, Jan and Kotliar, Gabriel},
abstractNote = {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.},
doi = {10.1038/s41467-019-10257-2},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {Thu Jun 20 00:00:00 EDT 2019},
month = {Thu Jun 20 00:00:00 EDT 2019}
}
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Fig. 1: Schematic sketch of the behavior of four characteristic temperature scales. $T^{onset}_{orb}$ (green dashed), $T^{onset}_{spin}$ (green solid), $T^{cmp}_{orb}$ (red dashed), $T^{cmp}_{spin}$ (red solid) mark the onset and the completion of screening of orbital and spin degrees of freedom, respectively, as functions of the bare gap, $Δ$b= U− 2J, betweenmore »
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