Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergence of quantum critical charge and spin-state fluctuations near
  the pressure-induced Mott transition in MnO, FeO, CoO, and NiO   We perform a comprehensive theoretical study of the pressure-induced
evolution of the electronic structure, magnetic state, and phase stability of
the late transition metal monoxides MnO, FeO, CoO, and NiO using a fully charge
self-consistent DFT+dynamical mean-field theory method. Our results reveal that
the pressure-induced Mott insulator-to-metal phase transition in MnO-NiO is
accompanied by a simultaneous collapse of local magnetic moments and lattice
volume, implying a complex interplay between chemical bonding and electronic
correlations. We compute the pressure-induced evolution of relative weights of
the different valence states and spin-state configurations. Employing the
concept of fluctuating valence in a correlated solid, we demonstrate that in
MnO, FeO, and CoO a Mott insulator-metal transition and collapse of the local
moments is accompanied by a sharp crossover of the spin-state and valence
configurations. Our microscopic explanation of the magnetic collapse differs
from the accepted picture and points out a remarkable dynamical coexistence
(frustration) of the high-, intermediate-, and low-spin states. In particular,
in MnO, the magnetic collapse is found to be driven by the appearance of the
intermediate-spin state (IS), competing with the low-spin (LS) state; in FeO,
we observe a conventional high-spin to low-spin (HS-LS) crossover. Most
interestingly, in CoO, we obtain a remarkable (dynamical) coexistence of the HS
and LS states, i.e., a HS-LS frustration, up to high pressure. Our results
demonstrate the importance of quantum fluctuations of the valence and spin
states for the understanding of quantum criticality of the Mott transitions.

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The categories of this paper are: bayes-an
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
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The categories of this paper are: econ