Fig. 4: Node velocities in superconductor for hole-doped normal state. | npj Quantum Materials

Fig. 4: Node velocities in superconductor for hole-doped normal state.

From: Emergence of nodal Bogoliubov quasiparticles across the transition from the pseudogap metal to the d-wave superconductor

Fig. 4

We show the velocities vF (a) and vΔ (b) as a function of b for different values of Φ. For small b, vF takes on the Fermi velocity of the normal state Fermi surface at kx = ky, while vΔ begins at 0 when B = 0 and increases with finite b as the effective pairing grows. For large b, vF approaches the Fermi velocity of the un-hybridized c electron bands, while vΔ tends to 0.

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