Local tunneling spectroscopy of the electron-doped cuprate Sm1.85Ce0.15CuO4

Details Local tunneling spectroscopy of the electron-doped cuprate Sm1.85Ce0.15CuO4 Local tunneling spectroscopy of the electron-doped cuprate Sm1.85Ce0.15CuO4

2007-05-29

arxiv.org/abs/0705.4217v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.76.132505

We present local tunneling spectroscopy in the optimally electron-doped cuprate Sm2-xCexCuO4 x=0.15. A clear signature of the superconducting gap is observed with an amplitude ranging from place to place and from sample to sample (Delta~3.5-6meV). Another spectroscopic feature is simultaneously observed at high energy above \pm 50meV. Its energy scale and temperature evolution is found to be compatible with previous photoemission and optical experiments. If interpreted as the signature of antiferromagnetic order in the samples, these results could suggest the coexistence on the local scale of antiferromagnetism and superconductivity on the electron-doped side of cuprate superconductors.

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