Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weyl Semimetal from the Honeycomb Array of Topological Insulator
  Nanowires   We show that isolated Weyl nodes can arise in a system of parallel
topological insulator nano-wires arranged in a honeycomb fashion. This
introduces another theoretical example of a topological semi-metal phase with
more than one pair of Weyl nodes and due to the simple form of its Hamiltonian
it can be used to study various interesting phenomena associated with this
phase. Our result emphasizes that depending on the separation of the Weyl nodes
a topological electromagnetic response might or might not emerge and two pairs
might have overall cancelling contributions to the net anomalous Hall
conductivity.

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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg