Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single particle spectra of charge transfer insulators by cluster
  perturbation theory - the correlated band structure of NiO   We propose a many-body method for band-structure calculations in strongly
correlated electron systems and apply it to NiO. The method may be viewed as a
translationally invariant version of the cluster method of Fujimori and Minami.
Thereby the Coulomb interaction within the d-shells is treated by exact
diagonalization and the d-shells then are coupled to a solid by an extension of
the cluster perturbation theory due to Senechal et al. The method is
computationally no more demanding than a conventional band structure
calculation and for NiO we find good agreement between the calculated single
particle spectral function and the experimentally measured band structure.

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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph