Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twist-bend heliconical chiral nematic liquid crystal phase of an achiral
  rigid bent-core mesogen   The chiral, heliconical (twist-bend) nematic ground state is reported in an
achiral, rigid, bent-core mesogen (UD68). Similar to the nematic twist-bend
(NTB) phase observed in bent molecular dimers, the NTB phase of UD68 forms
macroscopic, smectic-like focal-conic textures and exhibits nanoscale, periodic
modulation with no associated modulation of the electron density, i.e., without
a detectable lamellar x-ray reflection peak. The NTB helical pitch is pTB ~ 14
nm. When an electric field is applied normal to the helix axis, a weak
electroclinic effect is observed, revealing 50 um-scale left- and right-handed
domains in a chiral conglomerate.

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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
1
The categories of this paper are: cs
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The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: hep-lat