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We propose that spin-fluctuation-mediated spin-triplet superconductivity maybe realized in repulsive Hubbard models with disconnected Fermi surfaces. Theidea is confirmed for Hubbard models on triangular (dilute band filling) andhoneycomb (near half-filling) lattices using fluctuation exchangeapproximation, where triplet pairing order parameter with f-wave symmetry isobtained. Possible relevance to real superconductors is suggested.Comment: 5 pages, 6 figures, RevTeX, uses epsf.sty and multicol.st

Spin-triplet superconductivity in repulsive Hubbard models with disconnected Fermi surfaces: A case study on triangular and honeycomb lattices