Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thickness-tuned Superconductor-to-Insulator Transitions under magnetic
  field in a-NbSi   We have studied the thickness-induced superconductor-to-insulator transition
in the presence of a magnetic field for a-NbSi thin films. Analyzing the
critical behavior of this system within the "dirty boson model", we have found
a critical exponents product of $\nu_d z$ > 0.4. The corresponding phase
diagram in the (H,d) plane is inferred. This small exponent product as well as
the non-universal value of the critical resistance found at the transition call
for further investigations in order to thoroughly understand these transitions.

31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg