Superconducting energy gap in Bi1.8Pb0.4Sr2Ca2Cu3O10+δ studied by photoemission spectroscopy

C. Gu, B. W. Veal, R. Liu, A. P. Paulikas, P. Kostic, H. Ding, J. C. Campuzano, B. A. Andrews, R. I.R. Blyth, A. J. Arko, P. Manuel, D. Y. Kaufman, M. T. Lanagan

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14 Scopus citations


We report photoemission measurements on highly textured polycrystalline samples of Bi1.8Pb0.4Sr2Ca2Cu3O10+δ (Bi-2223, Tc=104 K). High-resolution data show a superconducting gap opening below Tc. The gap-spectrum line shape suggests an anisotropic gap structure in the Brillouin zone. The maximum gap in Bi-2223 is estimated to be 29 meV so that 2Δ/kTc∼6.5, somewhat larger than the reduced gap in Bi2Sr2CaCu2O8 (Bi-2212). A spectral dip feature is observed at 72 meV in the superconducting state. The results are compared with angle-resolved experiments on Bi-2212 single crystals.

Original languageEnglish (US)
Pages (from-to)1397-1400
Number of pages4
JournalPhysical Review B
Issue number2
StatePublished - 1995

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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