Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced polarization in strained BaTiO$_3$ from first principles   The structure, polarization, and zone-center phonons of bulk tetragonal
BaTiO$_3$ under compressive epitaxial stress are calculated using density
functional theory within the local density approximation. The polarization,
computed using the Berry-phase formalism, increases with increasing
tetragonality and is found to be enhanced by nearly 70% for the largest
compressive misfit strain considered (-2.28%). The results are expected to be
useful for the analysis of coherent epitaxial BaTiO$_3$ thin films and
heterostructures grown on perovskite substrates having a smaller lattice
constant, such as SrTiO$_3$.

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The categories of this paper are: adap-org
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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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: funct-an
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys