Fig. 4: Temperature and magnetic field dependence of the superconducting gap of Y.
From: Spectroscopic evidence for the superconductivity of elemental metal Y under pressure
a Temperature dependence of the two superconducting (SC) energy gaps obtained from different contacts P1 (open symbols) and P2 (solid symbols) at 48.6 GPa. The black and red lines are the best fits using the two-band s-wave BCS framework (see the main text for details). The reduced SC energy gaps for contacts P1 and P2 against reduced temperature are plotted in the inset. b Magnetic field dependence of the two SC energy gaps from P1 at 48.6 GPa and a fixed temperature of 5.0 K. The short-dashed lines are the estimated power-law behavior, Δ(H, 5.0 K) = Δ(0, 5.0 K)·(1 − H/Hc2)1/2. The reduced energy gaps as a function of the reduced field are plotted in the inset.
