Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrasonic Study of the Hidden Order and Heavy-Fermion State in
  URu$_2$Si$_2$ with Hydrostatic Pressure, Rh-doping, and High-Magnetic Fields   This paper reports recent progress of ultrasonic measurements on
URu$_2$Si$_2$, including ultrasonic measurements under hydrostatic pressure, in
pulsed-magnetic fields, and the effect of Rh-substitution. The observed changes
of the elastic responses shed light on the orthorhombic-lattice instability
with $\Gamma_3$-symmetry existing within the hidden order and the hybridized
5$f$-electron states of URu$_2$Si$_2$.

26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th