Direct Observation of a Nonmonotonic dx2-y2-Wave Superconducting Gap in the Electron-Doped High-Tc Superconductor Pr0.89LaCe0.11CuO4
H. MatsuiDepartment of Physics, Tohoku University, Sendai 980-8578, JapanKensei TerashimaDepartment of Physics, Tohoku University, Sendai 980-8578, JapanT. SatoDepartment of Physics, Tohoku University, Sendai 980-8578, JapanT. TakahashiDepartment of Physics, Tohoku University, Sendai 980-8578, JapanM. FujitaInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanKenneth M. YamadaInstitute for Materials Research, Tohoku University, Sendai 980-8577, Japan
2005en
ABI
Аннотация
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.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 3Использованных источников: 0