Fig. 7: Figures show comparison of superconducting properties for Sc2B2H4, V2B2H4, and Nb2B2H4.
From: High-Tc 2D ambient BCS superconductors in hydrogenated transition-metal borides
Top row: Momentum-resolved electron-phonon coupling strength λqν plotted across the Brillouin zone for phonon branches ν = 1–24. Middle row: Temperature dependence of the superconducting gap(s). Sc2B2H4 exhibits two distinct superconducting gaps, while V2B2H4, and Nb2B2H4 show a single-gap behavior. Bottom row: Fermi surface distribution of the superconducting gap Δ(k) at 10.0 K with energy window of 0.025 eV, illustrating anisotropy and multi-gap features. The color scale represents the magnitude of Δ(k) in meV.
