Absence of nodes in the energy gap of the high-temperature electron-doped Pr1.85Ce0.15CuO4-y superconductor using thermal conductivity and specific heat measurements

Details Absence of nodes in the energy gap of the high-temperature electron-doped Pr1.85Ce0.15CuO4-y superconductor using thermal conductivity and specific heat measurements Absence of nodes in the energy gap of the high-temperature electron-doped Pr1.85Ce0.15CuO4-y superconductor using thermal conductivity and specific heat measurements

2009-09-05

arxiv.org/abs/0909.1009v2

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures

Scientific paper

We present data analyses of the thermal conductivity and specific heat of electron-doped Pr1.85Ce0.15CuO4-y. The zero-field thermal conductivity and specific heat of this optimally electrondoped system can be only explained by a nodeless gap symmetry. The magnetic-field dependence of the electronic specific heat in the vortex state is in quantitative agreement with an s-wave theory. Our quantitative data analyses provide bulk evidence for a nodeless gap symmetry in optimally electron-doped cuprates.

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