Tunneling spectra of strongly coupled superconductors: Role of dimensionality

Abstract

We investigate numerically the signatures of collective modes in the tunneling spectra of superconductors. The larger strength of the signatures observed in the high-Tc superconductors, as compared to classical low-Tc materials, is explained by the low dimensionality of these layered compounds. We also show that the strong-coupling structures are dips (zeros in the d2I/dV2 spectrum) in d-wave superconductors, rather than the steps (peaks in d2I/dV2) observed in classical s-wave superconductors. Finally we question the usefulness of effective density of states models for the analysis of tunneling data in d-wave superconductors.

arXiv comment8 pages, 6 figures

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Cited by in corpus (3)

• Tunneling conductance and local density of states in tight-binding junctions
• Strong-coupling analysis of scanning tunneling spectra in Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$
• Bogoliubov quasiparticles coupled to the antiferromagnetic spin mode in a vortex core