title: Specific heat evidence for bulk s-wave gap symmetry of optimally electron-doped Pr(1.85)Ce(0.15)CuO(4-y) superconductors.
abstract: We reanalyze specific heat data for optimally electron-doped Pr(1.85)Ce(0.15)CuO(4-y) superconductors. The magnetic field dependence of the electronic specific heat in the vortex state does not support d-wave gap symmetry but agrees quantitatively with an s-wave theory. Furthermore, the field dependence at a finite temperature almost coincides with that for a conventional s-wave superconductor, Vi(3)Si. The present work provides bulk evidence for a nodeless s-wave gap symmetry in optimally electron-doped cuprates.
authors.affiliation: Department of Physics, Faculty of Science, Ningbo University, Ningbo, People's Republic of China. gzhao2@calstatela.edu
authors.forename: Guo-Meng
authors.initials: GM
authors.lastname: Zhao
authors.forename: Jun
authors.initials: J
authors.lastname: Wang