Single superconducting energy scale in electron-doped cuprate superconductor Pr_2-xCexCuO_4

Details Single superconducting energy scale in electron-doped cuprate superconductor Pr_2-xCexCuO_4 Single superconducting energy scale in electron-doped cuprate superconductor Pr_2-xCexCuO_4

2009-05-26

arxiv.org/abs/0905.4133v1

Phys. Rev. B 80, 012508 (2009)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.80.012508

The tunneling spectra of the electron-doped cuprate Pr_2-xCe_xCuO4 as a function of doping and temperature is reported. We find that the superconducting gap, delta, shows a BCS-like temperature dependence even for extremely low carrier concentrations (studied here for the first time). Moreover, delta follows the doping dependence of Tc, in strong contrast with tunneling studies of hole-doped cuprates. From our results we conclude that there is a single superconducting energy scale in the electron-doped cuprates.

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