Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A qualitative test for intrinsic size effect on ferroelectric phase
  transitions   The size effect in ferroelectrics is treated as a competition between the
geometrical symmetry of the ferroelectric sample and its crystalline symmetry.
The manifestation of this competition is shown to be polarization rotation,
which is driven by temperature and/or size variations, thus providing a
qualitative indication of intrinsic finite size effect on ferroelectrics. The
concept is demonstrated in a simple case of PbTiO3 nanowires having their axis
parallel to [111]C direction, where the size effect is shown to include
polarization rotation and an additional phase transition.

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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
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: dg-ga
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The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg