Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterizing the insulator adjacent to the superconductor in
  Bi$_2$Sr$_{2-x}$La$_{x}$CuO$_{6+\delta}$ ($x=0.3$)   The time-averaged and low--frequency noise transport properties were
investigated in the vicinity of the superconductor--insulator transition for a
Bi$_2$Sr$_{2-x}$La$_{x}$CuO$_{6+\delta}$ ($x=0.3$) thin film. The results are
consistent with a superconductor (metal) embedded in a strong insulator, the
latter showing two-dimensional variable range hopping properties. The weak
insulator behavior -- if any -- is attributed to the metallic inclusions only.

12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph