Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for mass renormalization in LaNiO$"" sub 3_: an in situ soft
  x-ray photoemission study of epitaxial films   We investigate the electronic structure of high-quality single-crystal
LaNiO$_3$ (LNO) thin films using in situ photoemission spectroscopy (PES). The
in situ high-resolution soft x-ray PES measurements on epitaxial thin films
reveal the intrinsic electronic structure of LNO. We find a new sharp feature
in the PES spectra crossing the Fermi level, which is derived from the
correlated Ni 3$d$ $e_g$ electrons. This feature shows significant enhancement
of spectral weight with decreasing temperature. From a detailed analysis of
resistivity data, the enhancement of spectral weight is attributed to
increasing electron correlations due to antiferromagnetic fluctuations.

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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph