Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: gamma-Mn at the border between weak and strong correlations   We investigate the role of magnetic fluctuations in the spectral properties
of paramagnetic gamma-Mn. Two methods are employed. The Local Density
Approximation plus Dynamical Mean-Field Theory together with the numerically
exact quantum Monte-Carlo solver is used as a reference for the spectral
properties. Then the same scheme is used with the computationally less
demanding perturbative spin-polarized fluctuation-exchange solver in
combination with the Disordered Local Moment approach, and photoemission
spectra are calculated within the one-step model. It is shown that the
formation of local magnetic moments in gamma-Mn is very sensitive to the value
of Hund's exchange parameter. Comparison with the experimental photoemission
spectra demonstrates that gamma-Mn is a strongly correlated system, with the
Hubbard band formation, which cannot be described by the perturbative approach.
However, minor change of parameters would transform it into a weakly correlated
system.

32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
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The categories of this paper are: cs
20
The categories of this paper are: acc-phys
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The categories of this paper are: math