TY - JOUR
T1 - Two-fermi-surface superconducting state and a nodal d-wave energy gap of the electron-doped Sm1.85Ce0.15CuO4-δ cuprate superconductor
AU - Santander-Syro, A. F.
AU - Ikeda, M.
AU - Yoshida, T.
AU - Fujimori, A.
AU - Ishizaka, K.
AU - Okawa, M.
AU - Shin, S.
AU - Greene, R. L.
AU - Bontemps, N.
PY - 2011/5/9
Y1 - 2011/5/9
N2 - We report on laser-excited angle-resolved photoemission spectroscopy in the electron-doped cuprate Sm1.85Ce0.15CuO 4-δ. 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 antiferrmagnetism 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.
AB - We report on laser-excited angle-resolved photoemission spectroscopy in the electron-doped cuprate Sm1.85Ce0.15CuO 4-δ. 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 antiferrmagnetism 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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U2 - 10.1103/PhysRevLett.106.197002
DO - 10.1103/PhysRevLett.106.197002
M3 - Article
AN - SCOPUS:79960647452
SN - 0031-9007
VL - 106
JO - Physical Review Letters
JF - Physical Review Letters
IS - 19
M1 - 197002
ER -