Abstract
We discuss the possibility of spin-triplet (ST) superconductivity in two-dimensional Hubbard model on triangular lattice within the third order perturbation theory. We obtain ST superconducting state. It is found that the vertex correction terms which are not included in the interaction mediated by the spin-fluctuation is essential for realizing the ST pairing for our searched values of parameters. We argue that the present mechanism of ST superconductivity can be applied to heavy-fermion superconductors UNi2Al3, UPt3.
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