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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Deng X,Stadler KM,Haule K,Weichselbaum A,von Delft J,Kotliar Gdoi
10.1038/s41467-019-10257-2subject
Has Abstractpub_date
2019-06-20 00:00:00pages
2721issue
1issn
2041-1723pii
10.1038/s41467-019-10257-2journal_volume
10pub_type
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