TY - JOUR
T1 - Direct observation of a nonmonotonic dx2-y2-wave superconducting gap in the electron-doped high-Tc superconductor Pr0.89LaCe0.11CuO4
AU - Matsui, H.
AU - Terashima, K.
AU - Sato, T.
AU - Takahashi, T.
AU - Fujita, M.
AU - Yamada, K.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2005/7/1
Y1 - 2005/7/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.95.017003
DO - 10.1103/PhysRevLett.95.017003
M3 - Article
AN - SCOPUS:27144509628
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 1
M1 - 017003
ER -