Fig. 3: Quasiparticle scattering spectra at 48.6 GPa.
From: Spectroscopic evidence for the superconductivity of elemental metal Y under pressure
a Schematic diagram of point-contact spectroscopy on Y inside the diamond anvil cell. b Normalized differential conductance, (dI/dV)/(dI/dV)10.5 K, at 2.0 K as a function of the bias voltage. The solid and dashed-dotted lines are the best fits to the two-band s-wave and single-band s-wave models, respectively. c Temperature evolution of (dI/dV)/(dI/dV)10.5 K from 2.0 to 10.4 K. The dotted lines are the best fits of data to the modified BTK model with two gaps plus intergrain Josephson effects (see the main text for details). d Magnetic field evolution of (dI/dV)/(dI/dV)8.5 T from 0.0 to 7.5 T at a fixed temperature of 5.0 K. All the curves are displayed with an offset for clarity. e Contour plot of (dI/dV)/(dI/dV)10.5 K of temperature (T) vs. bias voltage (V), where green (red) represents larger (smaller) differential conductance. f Contour plot of (dI/dV)/(dI/dV)8.5 T of field (μ0H) vs. bias voltage (V) at 5.0 K.
