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24 April 2024

» arxiv » cond-mat/9909119

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Spin-fluctuation exchange study of superconductivity in two- and three-dimensional single-band Hubbard models
Ryotaro Arita ; Kazuhiko Kuroki ; Hideo Aoki ;
Date:	8 Sep 1999
Subject:	cond-mat
Abstract:	In order to identify the most favorable situation for superconductivity in the repulsive single-band Hubbard model, we have studied instabilities for d-wave pairing mediated by antiferromagnetic spin fluctuations and p-pairing mediated by ferromagnetic fluctuations with the fluctuation exchange approximation in both two dimensions and three dimensions. By systematically varying the band filling and band structure we have shown that (i) d-pairing is stronger in two dimensions than in three dimensions, and (ii) p-pairing is much weaker than the d-pairing.
Source:	arXiv, cond-mat/9909119
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