Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absence of long-range superconducting correlations in the frustrated
  1/2-filled band Hubbard model   We present many-body calculations of superconducting pair-pair correlations
in the ground state of the half-filled band Hubbard model on large anisotropic
triangular lattices. Our calculations cover nearly the complete range of
anisotropies between the square and isotropic triangular lattice limits. We
find that the superconducting pair-pair correlations decrease monotonically
with increasing onsite Hubbard interaction U for inter-pair distances greater
than nearest neighbor. For the large lattices of interest here the distance
dependence of the correlations approaches that for noninteracting electrons.
Both these results are consistent with the absence of superconductivity in this
model in the thermodynamic limit. We conclude that the effective 1/2-filled
band Hubbard model, suggested by many authors to be appropriate for the
kappa-(BEDT-TTF)-based organic charge-transfer solids, does not explain the
superconducting transition in these materials.

23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga