Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced electron correlations in FeSb$_2$   FeSb$_2$ has been recently identified as a new model system for studying
many-body renormalizations in a $d$-electron based narrow gap semiconducting
system, strongly resembling FeSi. The electron-electron correlations in
FeSb$_2$ manifest themselves in a wide variety of physical properties including
electrical and thermal transport, optical conductivity, magnetic
susceptibility, specific heat and so on. We review some of the properties that
form a set of experimental evidences revealing the crucial role of correlation
effects in FeSb$_2$. The metallic state derived from slight Te doping in
FeSb$_2$, which has large quasiparticle mass, will also be introduced.

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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg