Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting ground state of nonsymmorphic superconducting compound
  Zr$_{2}$Ir   The nonsymmorphic Zr$_{2}$Ir alloy is a possible topological semimetal
candidate material and as such may be part of an exotic class of
superconductors. Zr$_{2}$Ir is a superconductor with a transition temperature
of 7.4 K with critical fields of 19.6(3) mT and 3.79(3) T, as determined by
heat capacity and magnetisation. Zero field muon spin relaxation measurements
show that time-reversal symmetry is preserved in these materials. The specific
heat and transverse field muon spin rotation measurements rule out any
possibility to have a nodal or anisotropic superconducting gap, revealing a
conventional s-wave nature in the superconducting ground state. Therefore, this
system is found to be conventional nonsymmorphic superconductor, with
time-reversal symmetry being preserved and an isotropic superconducting gap.

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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
3
The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: econ