A Mechanism of Spin-Triplet Superconductivity in Hubbard Model on Triangular La ttice: Application to UNi_2Al_3

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dc.creatorNisikawa, Yunori
dc.creatorYamada, Kosaku
dc.date2002-09-12
dc.date2005-12-03
dc.date.accessioned2026-07-07T06:34:43Z
dc.date.available2026-07-07T06:34:43Z
dc.descriptionWe discuss the possibility of spin-triplet superconductivity in a two-dimensional Hubbard model on a triangular lattice within the third-order perturbation theory. When we vary the symmetry in the dispersion of the bare energy band from D_2 to D_6, spin-singlet superconductivity in the D_2-symmetric system is suppressed and we obtain spin-triplet superconductivity in near the D_6-symmetric system. In this case, it is found that the vertex terms, which are not included in the interaction mediated by the spin fluctuation, are essential for realizing the spin-triplet pairing. We point out the possibility that obtained results correspond to the difference between the superconductivity of UNi_2Al_3 and that of UPd_2Al_3.
dc.description11pages, 5figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0209283
dc.identifierhttp://arxiv.org/abs/cond-mat/0209283
dc.identifierJ. Phys. Soc. Jpn. 71, 2629-2632 (2002)
dc.identifierdoi:10.1143/JPSJ.71.2629
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/99613
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleA Mechanism of Spin-Triplet Superconductivity in Hubbard Model on Triangular La ttice: Application to UNi_2Al_3
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