Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Selection of defect structures in twist-grain-boundary-A phase of chiral
  liquid crystals   We study the structure of the twist grain boundary in chiral smectic liquid
crystals using the Landau-de Gennes model. By considering spatial variation of
the smectic order, we distinguish the Melted-Grain-Boundary-A (MGBA) structure
with cholesteric-like domains and the Twist-Grain-Boundary-A (TGBA) structure
consisting of screw dislocations. The MGBA structure becomes stable near the
transition to the cholesteric phase. On approaching the transition, the
cholesteric-like domain grows outside the grain boundary. Also, the dislocation
spacings of the TGBA structure agree better with experimental results than
previous theories.

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The categories of this paper are: eess
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio