Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Melting dislocation transition in composite lithium greases with
  copper(II) carboxylate mesogenic additives   We propose the theoretical description for the temperature and concentration
phase transformations in composite lithium grease doped with the mesogenic
additives of the copper(II) carboxylates family, copper(II) valerate and
isovalerate, in the concentration range 1, 5, 10, 20 wt. percents. The changes
in character of specific electric conductivity of these composites manifested
in experiments on dielectric spectroscopy in the measuring electric field of
the frequencies 100 Hz - 1 MHz and polarization microscopy, are reliable caused
by reversible phase transitions from the discotic phase to isotropic one or at
heating from room temperature to 391 K. We study correlations between defect
structure and electrical properties of these composites using the model of the
BKT transition. This transformation from the discotic to isotropic phase is
associated with the evolution of topological defects dislocations induced by
the mesogenic additives. The screw, transverse edge and longitudinal
dislocations are realized in this case. We apply the numerical Monte Carlo
technique to define their critical properties in the BKT transition.

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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
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The categories of this paper are: patt-sol
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ