Quasiparticles in the superconducting state of Bi2 Sr2 CaCuO8 + δ

A. Kaminski, J. Mesot, H. Fretwell, J. C. Campuzano, M. R. Norman, M. Randeria, H. Ding, T. Sato, Takashi Takahashi, T. Mochiku, K. Kadowaki, H. Hoechst

Research output: Contribution to journalArticlepeer-review

190 Citations (Scopus)


Recent improvements in momentum resolution lead to qualitatively new angle-resolved photoemission spectroscopy results on the spectra of Bi2 Sr2 CaCuO8 + δ (Bi2212) along the (π, π) direction, where there is a node in the superconducting gap. We now see the intrinsic line shape, which indicates the presence of true quasiparticles at all Fermi momenta in the superconducting state, and lack thereof in the normal state. The region of momentum space probed here is relevant for charge transport, motivating a comparison of our results to conductivity measurements by infrared reflectivity.

Original languageEnglish
Pages (from-to)1788-1791
Number of pages4
JournalPhysical review letters
Issue number8
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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