Triplet superconductivity induced by screened phonon interactions in ferromagnetic compounds

Abstract

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.

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

References in corpus (3)

• Magnetism, Spin-Orbit Coupling, and Superconducting Pairing in UGe${}_2$
• Phase transition between d-wave and anisotropic s-wave gaps in high temperature oxides superconductors
• Pseudogap due to antiferromagnetic fluctuations and the phase diagram of the high temperature oxide superconductors

Cited by in corpus (8)

• Coexistence of ferromagnetism and superconductivity
• Anisotropic superconductivity mediated by phonons in layered compounds with weak screening effect
• Isotope effect in superconductors with coexisting interactions of phonon and nonphonon mechanisms
• Split transition in ferromagnetic superconductors
• Signatures of pairing mechanisms and order parameters in ferromagnetic superconductors
• Phonon spectrum of the ferromagnetic superconductor UGe${}_2$ : Consequences for the specific heat
• Spin-Triplet Superconductivity Mediated by Phonons in Quasi-One-Dimensional Systems
• Internal Transition of Superconducting State by Impurity Doping with a Jump of Isotope-effect Coefficient in Multiband Superconductors