Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unconventional superconductivity in the cage type compound
  Sc$_5$Rh$_6$Sn$_{18}$   We have examined the superconducting ground state properties of the caged
type compound Sc$_5$Rh$_6$Sn$_{18}$ using magnetization, heat capacity, and
muon-spin relaxation or rotation ($\mu$SR) measurements. Magnetization
measurements indicate type-II superconductivity with an upper critical field
$\mu_0H_{c2}(0)$ = 7.24 T. The zero-field cooled and field cooled
susceptibility measurements unveil an onset of diamagnetic signal below $T_{\bf
c}$ = 4.4 K. The interpretation of the heat capacity results below $T_{\bf c}$
using the $\alpha-$BCS model unveils the value of $\alpha$ = 2.65, which gives
the dimensionless ratio 2$\Delta(0)/k_B T_{\bf c}$ = 5.3, intimating that
Sc$_5$Rh$_6$Sn$_{18}$ is a strong-coupling BCS superconductor. The zero-field
$\mu$SR measurements in the longitudinal geometry exhibit a signature of a
spontaneous appearance of the internal magnetic field below the superconducting
transition temperature, indicating that the superconducting state is
characterized by the broken time-reversal symmetry (TRS). We have compared the
results of broken TRS in Sc$_5$Rh$_6$Sn$_{18}$ with that observed in
R$_5$Rh$_6$Sn$_{18}$ (R = Lu and Y).

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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: econ