Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic correlations in Hund metals   To clarify the nature of correlations in Hund metals and its relationship
with Mott physics we analyze the electronic correlations in multiorbital
systems as a function of intraorbital interaction U, Hund's coupling JH and
electronic filling n. We show that the main process behind the enhancement of
correlations in Hund metals is the suppression of the double-occupancy of a
given orbital, as it also happens in the Mott-insulator at half-filling.
However, contrary to what happens in Mott correlated states the reduction of
the quasiparticle weight Z with JH can happen on spite of increasing charge
fluctuations. Therefore, in Hund metals the quasiparticle weight and the mass
enhancement are not good measurements of the charge localization. Using simple
energetic arguments we explain why the spin polarization induced by Hund's
coupling produces orbital decoupling. We also discuss how the behavior at
moderate interactions, with correlations controlled by the atomic spin
polarization, changes at large $U$ and $J_H$ due to the proximity to a Mott
insulating state.

1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: math
16
The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th