Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Raman scattering from current-stabilized nonequilibrium phases in
  Ca$_2$RuO$_4$   We used Raman light scattering to study the current-stabilized nonequilibrium
semimetallic and metallic phases in Ca$_2$RuO$_4$. By determining the local
temperature through careful analysis of the Stokes and anti-Stokes intensities,
we find that Joule heating can be completely avoided by supplying sufficient
cooling power in a helium-flow cryostat, and that the current induces the
semimetallic state without inducing any significant heating. We further
investigate the current-induced semimetallic state as a function of temperature
and current. We confirm the absence of long-range antiferromagnetic order and
identify a substantial Fano broadening of several phonons, which suggests
coupling to charge and orbital fluctuations. Our results demonstrate that the
semimetallic state is a genuine effect of the applied electrical current and
that the current-induced phases have characteristics distinct from the
equilibrium ones.

34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat