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Signatures of Mottness and Hundness in archetypal correlated metals

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 sp...

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Autores principales: Deng, Xiaoyu, Stadler, Katharina M., Haule, Kristjan, Weichselbaum, Andreas, von Delft, Jan, Kotliar, Gabriel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586627/
https://www.ncbi.nlm.nih.gov/pubmed/31221960
http://dx.doi.org/10.1038/s41467-019-10257-2
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author Deng, Xiaoyu
Stadler, Katharina M.
Haule, Kristjan
Weichselbaum, Andreas
von Delft, Jan
Kotliar, Gabriel
author_facet Deng, Xiaoyu
Stadler, Katharina M.
Haule, Kristjan
Weichselbaum, Andreas
von Delft, Jan
Kotliar, Gabriel
author_sort Deng, Xiaoyu
collection PubMed
description 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.
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spelling pubmed-65866272019-06-24 Signatures of Mottness and Hundness in archetypal correlated metals Deng, Xiaoyu Stadler, Katharina M. Haule, Kristjan Weichselbaum, Andreas von Delft, Jan Kotliar, Gabriel Nat Commun Article 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. Nature Publishing Group UK 2019-06-20 /pmc/articles/PMC6586627/ /pubmed/31221960 http://dx.doi.org/10.1038/s41467-019-10257-2 Text en © The Author(s) 2019, last corrected publication 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Deng, Xiaoyu
Stadler, Katharina M.
Haule, Kristjan
Weichselbaum, Andreas
von Delft, Jan
Kotliar, Gabriel
Signatures of Mottness and Hundness in archetypal correlated metals
title Signatures of Mottness and Hundness in archetypal correlated metals
title_full Signatures of Mottness and Hundness in archetypal correlated metals
title_fullStr Signatures of Mottness and Hundness in archetypal correlated metals
title_full_unstemmed Signatures of Mottness and Hundness in archetypal correlated metals
title_short Signatures of Mottness and Hundness in archetypal correlated metals
title_sort signatures of mottness and hundness in archetypal correlated metals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586627/
https://www.ncbi.nlm.nih.gov/pubmed/31221960
http://dx.doi.org/10.1038/s41467-019-10257-2
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