Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spontaneous emergence of Josephson junctions in homogeneous rings of
  single-crystal Sr2RuO4   The chiral p-wave order parameter in Sr$_\mathsf{2}$RuO$_\mathsf{4}$ would
make it a special case amongst the unconventional superconductors. A
consequence of this symmetry is the possible existence of superconducting
domains of opposite chirality. At the boundary of such domains, the locally
supressed condensate can produce an intrinsic Josephson junction. Here, we
provide evidence of such junctions using mesoscopic rings, structured from
Sr$_\mathsf{2}$RuO$_\mathsf{4}$ single crystals. Our order parameter
simulations predict such rings to host stable domain walls across their arms.
Thisis verified with transport experiments on loops, with a sharp transition at
1.5 K, which show distinct critical current oscillations with periodicity
corresponding to the flux quantum. In contrast, loops with broadened
transitions at around 3 K are void of such junctions and show standard
Little-Parks oscillations. Our analysis demonstrates the junctions are of
intrinsic origin and makes a compelling case for the existence of
superconducting domains.

28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas