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Comparison of the Eliashberg functions determined from point-contact and break-junction tunnelling experiments in Bi2Sr2CaCu2O8+x

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Il Nuovo Cimento D

Summary

We present a comparison of the electron-phonon spectral functions α2(ω)Fω previously determined from point-contact tunnelling experiments in Bi2Sr2CaCu2O8+x with the same functions we obtained more recently from break-junction data of high quality after a numerical procedure for unfolding a part of the broadening found in the experimental conductance. The results indicate that large similarities are present, as well as some important differences that could be related to a certain degree of directionality along the (a, b)-plane of the tunnelling process in the break-junction experiments and to the effects of the unfolding procedure.

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Authors and Affiliations

  1. Dipartimento di Fisica, Politecnico di Torino, 10129, Torino, Italy

    R. S. Gonnelli & G. A. Ummarino

  2. P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

    O. V. Dolgov & S. I. Vedeneev

Authors
  1. R. S. Gonnelli
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  2. O. V. Dolgov
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  3. G. A. Ummarino
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  4. S. I. Vedeneev
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Gonnelli, R.S., Dolgov, O.V., Ummarino, G.A. et al. Comparison of the Eliashberg functions determined from point-contact and break-junction tunnelling experiments in Bi2Sr2CaCu2O8+x . Il Nuovo Cimento D 16, 1903–1907 (1994). https://doi.org/10.1007/BF02462192

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  • DOI: https://doi.org/10.1007/BF02462192

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