Phase-sensitive order parameter symmetry test experiments utilizing Nd2-xCexCuO4-y/Nb zigzag junctions

Details Phase-sensitive order parameter symmetry test experiments utilizing Nd2-xCexCuO4-y/Nb zigzag junctions Phase-sensitive order parameter symmetry test experiments utilizing Nd2-xCexCuO4-y/Nb zigzag junctions

2005-03-17

arxiv.org/abs/cond-mat/0503429v1

Physics

Condensed Matter

Strongly Correlated Electrons

Accepted for publication in Phys. Rev. Lett., 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.167001

Phase-sensitive order parameter symmetry test experiments are presented on the electron-doped high-T_c cuprate Nd2-xCexCuO4-y. These experiments have been conducted using zigzag-shaped thin film Josephson structures, in which the Nd2-xCexCuO4-y is connected to the low-T_c superconductor Nb via a Au barrier layer. For the optimally doped as well as for the overdoped Nd2-xCexCuO4-y a clear predominant dx2-y2-wave behavior is observed at T=4.2K. Both compounds were also investigated at T=1.6K, presenting no indications for a change to a predominant s-wave symmetry with decreasing temperature.

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