Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Zero-bias crossings and peculiar Shapiro maps in graphene Josephson
  junctions   The AC Josephson effect manifests itself in the form of "Shapiro steps" of
quantized voltage in Josephson junctions subject to RF radiation. This effect
presents an early example of a driven-dissipative quantum phenomenon and is
presently utilized in primary voltage standards. Shapiro steps have also become
one of the standard tools to probe junctions made in a variety of novel
materials. Here, we study Shapiro steps in a widely tunable graphene-based
Josephson junction. We investigate the variety of patterns that can be obtained
in this well-understood system depending on the carrier density, temperature,
RF frequency, and magnetic field. Although the patterns of Shapiro steps can
change drastically when just one parameter is varied, the overall trends can be
understood and the behaviors straightforwardly simulated. The resulting
understanding may help in interpreting similar measurements in more complex
materials.

6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas