Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Destruction of Strong Critical Spin Fluctuations by Doping in the 2D
  Hubbard Model   We present the doping dependence of the spectral functions, density of states
and low frequency behavior of the self-energy for the 2D Hubbard model on the
basis of our recently developed theory for the Hubbard model. Strong 2D
critical spin fluctuations dominating near half-filling are completely
destroyed by 13 and 20 percent doping concentrations for U=4 and 8,
respectively. Below these concentrations the imaginary part of the self-energy
vanishes quadratically in frequency near the Fermi energy, a characteristic
feature for the Fermi liquid.

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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con