Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weak antilocalization in a noncentrosymmetric CaAgBi single crystal   We report on the single crystal growth and transport properties of a
topological semimetal CaAgBi which crystallises in the hexagonal $ABC-$type
structure with the non-centrosymmetric space group $\mathit{P6_3mc}$ (No. 186).
The transverse magnetoresistance measurements with current in the basal plane
of the hexagonal crystal structure reveal a value of about 30 % for I //
[10-10] direction and about 50 % for I // [1-210] direction at 10 K in an
applied magnetic field of 14 T. The magnetoresistance shows a cusp-like
behavior in the low magnetic-field region, suggesting the presence of weak
antilocalization effect for temperatures less than 100 K. The Hall measurements
reveal that predominant charge carriers are $p$ type exhibiting a linear
behavior for fields up to 14 T and can be explained based on the single band
model. The magnetoconductance of CaAgBi is analysed based on the modified
Hikami-Larkin-Nagaoka (HLN) model. Our first-principles calculations within a
density-functional theory framework reveal that CaAgBi supports a topological
Dirac semimetal state with Dirac points located on the rotational axis slightly
above the Fermi level and are protected by $C_{6v}$ point-group symmetry. The
Fermi surface consists of both the electron and hole pockets. However, the size
of hole pockets is much larger than electron pockets suggesting the dominant
$p$ type carriers in accord with our experimental results.

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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: math
10
The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga