ARPES study on many-body interactions in high-Tc cuprates: Origin of kink in energy dispersion

Takashi Takahashi

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1 Citation (Scopus)


We report a systematic high-resolution ARPES study on Bi2Sr 2Can-1CunO2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near EF located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above Tc. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.

Original languageEnglish
Pages (from-to)193-197
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Issue number1-3
Publication statusPublished - 2006 Jan


  • C. Photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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