2002/09/10 by Debanand Sa
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.66.140505
published as Phys. Rev B, 66, 140505(R) (2002) · 4 pages, Phys. Rev. B (Rapid) accepted
arxiv created 2002/09/10 · openalex publication_date 2002/10/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We consider a coexistence phase of both ferromagnetism and superconductivity and solve the self-consistent mean-field equations at zero temperature. The superconducting gap is shown to vanish at the Stoner point whereas the magnetization does not. This indicates that the paramagnetic-ferromagnetic quantum critical point becomes a hidden critical point. The effective mass in such a phase gets enhanced whereas the spin-wave stiffness is reduced as compared to the pure ferromagnetic phase. The spin-wave stiffness remains finite even at the paramagnetic-ferromagnetic quantum critical point.