Abstract
It is shown that the two-dimensional electron system of low-density, when described by the Hubbard model, is unstable towards superconductive transition in thed-wave pairing state.
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Baranov, M.A., Kagan, M.Y. D-wave pairing in the two-dimensional Hubbard model with low filling. Z. Physik B - Condensed Matter 86, 237–239 (1992). https://doi.org/10.1007/BF01313830
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DOI: https://doi.org/10.1007/BF01313830