Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resistivity Minimum in Granular Composites and Thin Metallic Films   We analyze the temperature dependence of conductivity in thick granular
ferromagnetic compounds NiSiO2 and in thin weakly coupled films of Fe, Ni and
Py in vicinity of metal-insulator transition. Development of resistivity
minimum followed by a logarithmic variation of conductivity at lower
temperatures is attributed to granular structure of compounds and thin films
fabricated by conventional deposition techniques. Resistivity minimum is
identified as a transition between temperature dependent intra-granular
metallic conductance and thermally activated inter-granular tunneling.

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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas