Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Origin of gap-like behaviors in URu$_2$Si$_2$: Combined study via
  quasiparticle scattering spectroscopy and resistivity measurements   We address two long-standing questions regarding the hidden order in URu2Si2:
Is it associated with the hybridization process, and what are the distinct
roles played by the localized and itinerant electrons? Our quasiparticle
scattering spectroscopy reveals a hybridization gap ubiquitous in the entire
phase space spanned by P and Fe substitutions in URu2Si2, including the
no-order and antiferromagnetic regions, with minimal change upon crossing the
phase boundary. This indicates its opening isn't associated with the ordering,
and thus localized electrons must be the major player. Towards a consistent
understanding of all the other gap-like behaviors observed only below
transition temperatures, we analyze the electrical resistivity using a model in
which gapped bosonic excitations are the dominant scattering source. With their
stiffness set to follow an unusual temperature dependence (decreasing with
decreasing temperature), this model fits all of our resistivity data well
including the jump at the transition. Remarkably, the extracted gap increases
slowly with increasing Fe content, similarly to the gap detected by inelastic
neutron scattering at Q1 = (1.4, 0, 0), suggesting a common origin. Such a
model can also naturally explain the Hall effect temperature dependence without
invoking Fermi surface gapping.

16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex