Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integrating superconducting van der Waals materials on paper substrates   Paper has the potential to dramatically reduce the cost of electronic
components. In fact, paper is 10 000 times cheaper than crystalline silicon,
motivating the research to integrate electronic materials on paper substrates.
Among the different electronic materials, van der Waals materials are
attracting the interest of the scientific community working on paper-based
electronics because of the combination of high electrical performance and
mechanical flexibility. Up to now, different methods have been developed to
pattern conducting, semiconducting and insulating van der Waals materials on
paper but the integration of superconductors remains elusive. Here, the
deposition of NbSe2, an illustrative van der Waals superconductor, on standard
copy paper is demonstrated. The deposited NbSe2 films on paper display
superconducting properties (e.g. observation of Meissner effect and resistance
drop to zero-resistance state when cooled down below its critical temperature)
similar to those of bulk NbSe2.

7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol