A photoemission investigation of the superconducting gap in an electron-doped cuprate superconductor

We have performed angle resolved photoelectron spectroscopy (ARPES) on the electron-doped cuprate superconductor Nd1.85Ce0.15CuO4. Evidence is found for an anisotropic superconducting gap that is consistent with the existence of a d-wave superconducting order parameter in the n-type cuprate superconductors. (C) 2001 Elsevier Science B.V. All rights reserved.