Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting properties in tantalum decorated three-dimensional
  graphene and carbon structures   We present here the results on superconducting properties in tantalum thin
films (100nm thick) deposited on three-dimensional graphene (3DG) and carbon
structures. A superconducting transition is observed in both composite thin
films with a superconducting transition temperature of 1.2K and 1.0K,
respectively. We have further measured the magnetoresistance at various
temperatures and differential resistance dV/dI at different magnetic fields in
these two composite thin films. In both samples, a much large critical magnetic
field (~ 2 Tesla) is observed and this critical magnetic field shows linear
temperature dependence. Finally, an anomalously large cooling effect was
observed in the differential resistance measurements in our 3DG-tantalum device
when the sample turns superconducting. Our results may have important
implications in flexible superconducting electronic device applications.

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The categories of this paper are: acc-phys
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The categories of this paper are: eess
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom