Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current-driven transformations of the intermediate state patterns in
  type-I superconductors   Dynamic structure of the intermediate state was studied in pinning-free thick
Pb strips using real-time magneto-optical visualization. It is found that
topological hysteresis can be lifted by applying sufficiently large current.
Namely, laminar structure that appears on flux exit in a static case is turned
into tubular when the sufficiently large transport current is present. Size and
distribution of the flux tubes in static and dynamic regimes are different.
Temperature, magnetic field and current phase diagram is discussed.

33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
17
The categories of this paper are: q-fin