Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synthesis and physical properties of LiBC intermetallics   Polycrystalline samples of LiBC compounds, which were predicted as possible
candidate for high-Tc superconductivity, have been synthesised by a flux method
and investigated by means of electrical resistivity and magnetic
susceptibility. Scanning electron microscopy and X-ray diffraction patterns
showed a plate-like morphology and a single-phase nature of LiBC samples for
starting composition of Li1.25BC (flux composition). The lattice constants a, c
display a systematic variation with x and has maximum volume of the hexagonal
unit cell at x = 1.25. Electrical resistivity measurements revealed an
extrinsic semi-conducting behaviour of the single-phase LiBC with an activation
energy of 18 meV and a maximum specific resistivity of 2.5 Wcm at 300 K. In
contrast to the theoretical prediction of high Tc, no superconducting features
were detected down to 2 K both, by measurements of electrical resistivity and
magnetic susceptibility.

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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
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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: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
2
The categories of this paper are: math
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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: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys