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Two-Fermi-surface superconducting state and a nodal d-wave gap in the electron-doped Sm(1.85)Ce(0.15)CuO(4-d) cuprate superconductor

A. F. Santander-Syro 1 Masaki Ikeda Teppei Yoshida Atsushi Fujimori Kyoko Ishizaka Mario Okawa Shik Shin Richard L. Greene Nicole Bontemps 2
1 CSNSM PS2
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : We report on laser-excited angle-resolved photoemission spectroscopy (ARPES) in the electron-doped cuprate Sm(1.85)Ce(0.15)CuO(4-d). The data show the existence of a nodal hole-pocket Fermi-surface both in the normal and superconducting states. We prove that its origin is long-range antiferromagnetism by an analysis of the coherence factors in the main and folded bands. This coexistence of long-range antiferromagnetism and superconductivity implies that electron-doped cuprates are two-Fermi-surface superconductors. The measured superconducting gap in the nodal hole-pocket is compatible with a d-wave symmetry.
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Submitted on : Tuesday, May 31, 2011 - 4:58:13 PM
Last modification on : Wednesday, September 23, 2020 - 11:54:52 AM

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A. F. Santander-Syro, Masaki Ikeda, Teppei Yoshida, Atsushi Fujimori, Kyoko Ishizaka, et al.. Two-Fermi-surface superconducting state and a nodal d-wave gap in the electron-doped Sm(1.85)Ce(0.15)CuO(4-d) cuprate superconductor. Physical Review Letters, American Physical Society, 2011, 106, pp.197002. ⟨10.1103/PhysRevLett.106.197002⟩. ⟨in2p3-00597384⟩

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