Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strain mediated suppression of the metal-insulator transition in EuNiO3
  thin films   Ultrathin epitaxial films of EuNiO3 were grown on a series of substrates
traversing highly compressive (- 2.4%) to highly tensile (2.5%) lattice
mismatch. X-ray diffraction measurements showed the expected c-lattice
parameter shift for compressive strain, but no detectable shift for tensilely
strained substrates, while reciprocal space mapping confirmed the tensile
strained film maintained epitaxial coherence. Transport measurements showed a
successively (from tensile to compressive) lower resistance and a complete
suppression of the metalinsulator transition at highly compressive lattice
mismatch. Corroborating these findings, X-ray absorption spectroscopy
measurements revealed a strong multiplet splitting in the tensile samples that
progressively weakens with increasing compressive strain that, combined with
cluster calculations, showed enhanced covalence between Ni-d and O-p orbitals
leads to the metallic state.

5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess