Photoemission study of the superconducting-gap symmetry in electron-doped high-Tc superconductors

H. Matsui, T. Sato, T. Takahashi, K. Nakayama, K. Terashima, M. Fujita, K. Yamada

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

To study the superconducting-gap symmetry in electron-doped HTSC, we performed a high-resolution ARPES on Pr0.89LaCe0.11CuO4 (optimally-doped, Tc = 26 K). Obtained momentum dependence of the superconducting gap is basically consistent with the dx2 - y2-wave symmetry, but obviously deviates from the monotonic form of the dx2 - y2 gap function. The maximum superconducting gap is not located at the zone boundary as expected from a simple dx2 - y2-wave, but observed at the so-called hot spot where the antiferromagnetic spin fluctuation strongly couples to the electrons on the Fermi surface. This ARPES result suggests that the spin-correlation plays an essential role in the pairing mechanism of electron-doped HTSC.

Original languageEnglish
Pages (from-to)862-863
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume460-462 II
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Sep 1 2007

Keywords

  • Angle-resolved photoemission
  • Electron-doped cuprates
  • Superconducting gap

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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    Matsui, H., Sato, T., Takahashi, T., Nakayama, K., Terashima, K., Fujita, M., & Yamada, K. (2007). Photoemission study of the superconducting-gap symmetry in electron-doped high-Tc superconductors. Physica C: Superconductivity and its applications, 460-462 II(SPEC. ISS.), 862-863. https://doi.org/10.1016/j.physc.2007.03.155