Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crossover from impurity-controlled to granular superconductivity in
  (TMTSF)2ClO4   Using a proper cooling procedure, a controllable amount of non-magnetic
structural disorder can be introduced at low temperature in (TMTSF)2ClO4. Here
we performed simultaneous measurements of transport and magnetic properties of
(TMTSF)2ClO4 in its normal and superconducting states, while finely covering
three orders of magnitude of the cooling rate around the anion ordering
temperature. Our result reveals, with increasing density of disorder, the
existence of a crossover between homogeneous defect-controlled d-wave
superconductivity and granular superconductivity. At slow cooling rates, with
small amount of disorder, the evolution of superconducting properties is well
described with the Abrikosov-Gorkov theory, providing further confirmation of
non-s-wave pairing in this compound. In contrast, at fast cooling rates, zero
resistance and diamagnetic shielding are achieved through a randomly
distributed network of superconducting puddles embedded in an normal conducting
background and interconnected by proximity effect coupling. The temperature
dependence of the AC complex susceptibility reveals features typical for a
network of granular superconductors. This makes (TMTSF)2ClO4 a model system for
granular superconductivity where the grain size and their concentration are
tunable within the same sample.

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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess