Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental Study of Positionally Disordered Josephson Junctions Arrays   We experimentally studied the effect of positional disorder on a Josephson
junction array with $f = n$, ${1/2} + n$, or ${2/5} + n$ flux quanta per unit
cell for integral $n$. This system provides an experimental realization of a
two-dimensional XY model with random phase shifts. Contrary to many earlier
numerical and analytical investigations, our results suggest that
low-temperature superconductivity is never destroyed by positional disorder. As
the disorder strength increased, the Kosterltz-Thouless (KT) type order in the
$f = 0$ and 1/2 systems changed to a non-KT type order with a long-range phase
coherence, which persisted even in the maximal disorder limit. A possible
finite-temperature glass transition is discussed.

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The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph