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Tunneling spectra of strongly coupled superconductors: Role of dimensionality

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Published in Physical Review. B, Condensed Matter. 2010, vol. 82, no. 2, p. 024504
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.
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BERTHOD, Christophe. Tunneling spectra of strongly coupled superconductors: Role of dimensionality. In: Physical Review. B, Condensed Matter, 2010, vol. 82, n° 2, p. 024504. https://archive-ouverte.unige.ch/unige:23844

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Deposited on : 2012-11-07

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