Triplet superconductivity induced by screened phonon interactions in ferromagnetic compounds

Details Triplet superconductivity induced by screened phonon interactions in ferromagnetic compounds Triplet superconductivity induced by screened phonon interactions in ferromagnetic compounds

2000-11-10

arxiv.org/abs/cond-mat/0011188v3

Europhys. Lett. Vol.57 (2002) pp.247.

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, (Latex, revtex.sty, epsf.sty)

Scientific paper

10.1209/epl/i2002-00568-7

We propose that screened pairing interactions mediated by phonons could give rise to a spin triplet superconductivity in ferromagnetic compounds such as UGe_2. It is pointed out that the pairing interactions include anisotropic components such as those of p, d, f-waves in addition to dominant s-wave component due to the momentum dependence. Since the ferromagnetic long-range order coexists, there is a large splitting of the Fermi surfaces of up and down spin electrons, which suppresses singlet pairing. Therefore, triplet pairing occurs at last due to the sub-dominant anisotropic interactions, even in the absence of magnetic contribution to the pairing interactions.

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