期刊
SCIENCE
卷 291, 期 5508, 页码 1517-1519出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1058021
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High-resolution angle-resolved photoemission spectroscopy of the electron-doped high-temperature superconductor Nd2-xCexCuO4 (x = 0.15, transition temperature T-c = 22 K) has found the quasiparticle signature as well as the anisotropic d(x2-y2)-like superconducting gap. The spectral line shape at the superconducting state shows a strong anisotropic nature of the many-body interaction. The result suggests that the electron-hole symmetry is present in the high-temperature superconductors.
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