Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fluctuation conductivity due to the preformed local pairs   We investigate the properties of a system where the itinerant electrons
coexist and interact with the preformed local pairs. Using the nonperturbative
continuous unitary transformation technique we show that Andreev-type
scattering between these charge carriers gives rise to the enhanced diamagnetic
response and is accompanied by appearance of the Drude peak inside the
pseudogap regime \omega <2\Delta_{pg}. Both thes effects are caused above the
transition temperature T_c by the short-range superconducting correlations. In
fact, the residual diamagnetism has been detected by the torque magnetometry in
the lanthanum and bismuth cuprate superconductors at temperatures up to ~
1.5T_c. In this work we show how the superconducting correlations can be
observed in the a.c. and d.c. conductivity.

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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
2
The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci