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Impurity Effects on Energy Gap in Bi2Sr2CaCu2O8+y Investigated by Electronic Raman Scattering

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Abstract

The Raman scattering experiments were carried out in Zn-doped and Zn-free Bi2Sr2CaCu2O8+y with optimal hole concentration below and above T c . The energy of pair-breaking peak in the B 1g Raman spectrum, corresponding to the magnitude of superconducting gap 2Δ 0, is suppressed by 1% Zn-doping. In the normal state, the B 1g Raman spectrum for Zn-doped sample shows no pseudogap behaviour, suggesting that the pseudogap is strongly smeared by Zn-doping.

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Authors and Affiliations

  1. Division of Applied Sciences, Muroran Institute of Technology, Muroran, 050-8585, Japan

    N. Momono, Y. Amakai, Y. Sato, T. Suzuki, H. Takano & S. Murayama

  2. Division of Physics, Faculty of Science, Hokkaido University, Sapporo, 060, Japan

    T. Kurosawa, M. Oda & M. Ido

  3. Division of Information and Electronic Engineering, Muroran Institute of Technology, Muroran, 050-8585, Japan

    A. Sakai

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  1. N. Momono
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  2. T. Kurosawa
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  3. Y. Amakai
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  4. Y. Sato
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  5. T. Suzuki
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  6. H. Takano
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  7. S. Murayama
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  8. A. Sakai
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  9. M. Oda
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  10. M. Ido
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Correspondence to N. Momono.

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Momono, N., Kurosawa, T., Amakai, Y. et al. Impurity Effects on Energy Gap in Bi2Sr2CaCu2O8+y Investigated by Electronic Raman Scattering. J Supercond Nov Magn 23, 785–787 (2010). https://doi.org/10.1007/s10948-010-0694-z

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  • DOI: https://doi.org/10.1007/s10948-010-0694-z

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