Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Point-Contact Spectroscopy of Iron-Based Layered Superconductor
  LaO$_{0.9}$F$_{0.1-\delta}$FeAs   We present point-contact spectroscopy data for junctions between a normal
metal and the newly discovered F-doped superconductor
LaO$_{0.9}$F$_{0.1-\delta}$FeAs (F-LaOFeAs). A zero-bias conductance peak was
observed and its shape and magnitude suggests the presence of Andreev bound
states at the surface of F-LaOFeAs, which provides a possible evidence of an
unconventional pairing symmetry with a nodal gap function. The maximum gap
value $\Delta_0\approx3.9\pm0.7$meV was determined from the measured spectra,
in good agreement with the recent experiments on specific heat and lower
critical field.

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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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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: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex