Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fluctuation conductivity and pseudogap in optimally doped SmFeAsO(1-x)   We report the analysis of fluctuation conductivity (FLC) and pseudogap (D*)
in Fe-based superconductor SmFeAsO0.85 with Tc = 55 K derived from resistivity
experiments. In the FLC analysis distinct 2D-3D (MT-AL) crossover typical for
cuprates but followed by enhanced MT fluctuation contribution was found. Using
the crossover temperature To coherence length along c-axis Xc(0) was
determined. Rather specific D*(T) dependence with two representative
temperatures followed by minimum at about 125 K was observed. Below Ts = 147 K,
corresponding to SDW ordering, D*(T) decreases linearly down to TAF = 133 K.
This last peculiarity can likely be attributed to antiferromagnetic (AF)
ordering in FeAs planes. It is believed that found behavior is strongly
associated with specific electronic configuration of the Fe-based compounds

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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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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: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: physics
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph