Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical Behavior of the Conductivity of Si:P at the Metal-Insulator
  Transition under Uniaxial Stress   We report new measurements of the electrical conductivity sigma of the
canonical three-dimensional metal-insulator system Si:P under uniaxial stress
S. The zero-temperature extrapolation of sigma(S,T -> 0) ~\S - S_c\^mu shows an
unprecidentedly sharp onset of finite conductivity at S_c with an exponent mu =
1. The value of mu differs significantly from that of earlier stress-tuning
results. Our data show dynamical sigma(S,T) scaling on both metallic and
insulating sides, viz. sigma(S,T) = sigma_c(T) F(\S - S_cT^y) where sigma_c(T)
is the conductivity at the critical stress S_c. We find y = 1/znu = 0.34 where
nu is the correlation-length exponent and z the dynamic critical exponent.

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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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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: bayes-an
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The categories of this paper are: astro-ph