Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Local observation of linear-$T$ superfluid density and anomalous vortex
  dynamics in URu$_2$Si$_2$   The heavy fermion superconductor URu$_2$Si$_2$ is a candidate for chiral,
time-reversal symmetry-breaking superconductivity with a nodal gap structure.
Here, we microscopically visualized superconductivity and spatially
inhomogeneous ferromagnetism in URu$_2$Si$_2$. We observed linear-$T$
superfluid density, consistent with d-wave pairing symmetries including chiral
d-wave, but did not observe the spontaneous magnetization expected for chiral
d-wave. Local vortex pinning potentials had either four- or two-fold rotational
symmetries with various orientations at different locations. Taken together,
these data support a nodal gap structure in URu$_2$Si$_2$ and suggest that
chirality either is not present or does not lead to detectable spontaneous
magnetization.

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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math