Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unusual Nonmagnetic Ordered State in CeCoSi Revealed by $^{59}$Co-NMR
  and NQR Measurements   We performed $^{59}$Co nuclear magnetic and quadrupole resonance (NMR and
NQR) measurements under pressure on a single-crystalline CeCoSi, which
undergoes an unresolved phase transition at $T_0$. The NQR spectra clearly
showed that the phase transition at $T_0$ is nonmagnetic, but any symmetry
lowering at the Co site was not seen irrespective of the feature of
second-order phase transition. By contrast, the NMR spectra were split by the
induced magnetic field perpendicular to the external magnetic field. These
results show that the phase below $T_0$ is not a simple paramagnetic state but
is most likely electric multipolar ordered state of Ce $4f$ electrons. The
development of the Kondo effect by applying pressure is thought to be crucial
to stabilize this state and to show novel features beyond commonality of
tetragonal Ce-based systems.

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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
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The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat