Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vortex-unbinding and finite-size effects in Tl2Ba2CaCu2O8 thin films   Current-voltage ($I$-$V$) characteristics of Tl$_2$Ba$_2$CaCu$_2$O$_8$ thin
films in zero magnetic field are measured and analyzed with the conventional
Kosterlitz-Thouless-Berezinskii (KTB) approach, dynamic scaling approach and
finite-size scaling approach, respectively. It is found from these results that
the $I$-$V$ relation is determined by the vortex-unbinding mechanism with the
KTB dynamic critical exponent $z=2$. On the other hand, the evidence of
finite-size effect is also found, which blurs the feature of a phase
transition.

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The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th