Direct observation of a nonmonotonic dx2-y2-wave superconducting gap in the electron-doped high-Tc superconductor Pr0.89LaCe0.11CuO4

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

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146 Citations (Scopus)

Abstract

We performed high-resolution angle-resolved photoemission spectroscopy on electron-doped high-Tc superconductor Pr0.89LaCe0.11CuO4 to study the anisotropy of the superconducting gap. The observed momentum dependence is basically consistent with the dx2-y2-wave symmetry, but obviously deviates from the monotonic dx2-y2 gap function. The maximum gap is observed not at the zone boundary, but at the hot spot where the antiferromagnetic spin fluctuation strongly couples to the electrons on the Fermi surface. The present experimental results suggest the spin-mediated pairing mechanism in electron-doped high-Tc superconductors.

Original languageEnglish
Article number017003
JournalPhysical Review Letters
Volume95
Issue number1
DOIs
Publication statusPublished - Jul 1 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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