Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin freezing and the Sachdev-Ye model   Spin-freezing is the origin of bad-metal physics and non-Fermi liquid
(non-FL) properties in a broad range of correlated compounds. In a
multi-orbital lattice system with Hund coupling, doping of the half-filled Mott
insulator results in a highly incoherent metal with frozen magnetic moments.
These moments fluctuate and collapse in a crossover region that is
characterized by unusual non-Fermi liquid properties such as a self-energy
whose imaginary part varies $\propto \sqrt{\omega}$ over a wide energy range.
At low enough temperature, the local moment fluctuations induce electron
pairing and this mechanism may be the unifying principle of unconventional
superconductivity. While this physics has been discovered in numerical studies
of multi-orbital Hubbard systems, it exhibits a striking similarity to the
analytically solvable Sachdev-Ye (SY) model, and its recent fermionic
extensions. Here, we clarify the relation between spin-freezing and SY physics,
and thus shed light on fundamental properties of Hund metals.

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The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ