Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ferrielectricity in an Organic Ferroelectric   We report ferrielectricity in a single-phase crystal, TSCC -- tris-sarcosine
calcium chloride [(CH3NHCH2COOH)3CaCl2]. Ferrielectricity is well known in
smectic liquid crystals but almost unknown in true crystalline solids. Pulvari
reported it in 1960 in mixtures of ferroelectrics and antiferroelectrics, but
only at high fields. TSCC exhibits a second-order displacive phase transition
near Tc = 130 K that can be lowered to a Quantum Critical Point at zero Kelvin
via Br- or I-substitution, and phases predicted to be antiferroelectric at high
pressure and low temperatures. Unusually, the size of the primitive unit cell
does not increase. We measure hysteresis loops and polarization below T = 64 K
and clear Raman evidence for this transition, as well of another transition
near 47-50 K. X-ray and neutron studies below Tc = 130K show there is an
antiferroelectric displacement out of plane of two sarcosine groups; but these
are antiparallel displacements are of different magnitude, leading to a bias
voltage that grows with decreasing T. A monoclinic subgroup C2 may be possible
at the lowest temperatures (T<64K or T<48K), but no direct evidence exists for
a crystal class lower than orthorhombic.

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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph