Anomalous electronic structure and pseudogap effects in Nd1.85Ce0.15CuO4 -: art. no. 147003

We report a high-resolution angle-resolved photoemission spectroscopic stud of the electron-doped (n-type) cuprate superconductor Nd1.85Ce0.15CuO4. We observe regions along the Fermi surface where the near-EF intensity is suppressed and the spectral features are broad in a manner reminiscent of the high-energy pseudogap in the underdoped p-type (hole doped) cuprates. However, instead of occurring near the (pi, 0) region, as in the p-type materials, this pseudogap falls near the intersection of the underlying Fermi surface with the antiferromagnetic Brillouin zone boundary.