Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photoemission Spectral Weight Transfer and Mass Renormalization in the
  Fermi-Liquid System La$_{1-x}$Sr$_x$TiO$_{3+y/2}$   We have performed a photoemission study of La$_{1-x}$Sr$_x$TiO$_{3+y/2}$ near
the filling-control metal-insulator transition (MIT) as a function of hole
doping. Mass renormalization deduced from the spectral weight and the width of
the quasi-particle band around the chemical potential $\mu$ is compared with
that deduced from the electronic specific heat. The result implies that, near
the MIT, band narrowing occurs strongly in the vicinity of $\mu$. Spectral
weight transfer occurs from the coherent to the incoherent parts upon
antiferromagnetic ordering, which we associate with the partial gap opening at
$\mu$.

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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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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: math-ph
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The categories of this paper are: acc-phys