Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous charge transport of the parent antiferromagnet Bi2Sr2RCu2O8   The resistivity and the thermopower for Bi2Sr2Ca{1-x}RxCu2O8 single crystals
are measured and analyzed with a special interest in the parent antiferromagnet
insulators. Above room temperature, the parent insulators show an electric
conduction confined in the CuO2 plane and a decreasing thermopower with
temperature, which are very similar to those for high-$T_c$ cuprates. These
data strongly suggest that essential anomalies of high-Tc cuprates inheres in
the parent insulators.

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The categories of this paper are: cs
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
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The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph