Nodal Order Parameter in Electron-Doped Superconducting Films Pr(2-x)Ce(x)CuO(4-y) (x=0.13, 0.15 and 0.17)
Abstract
The London penetration depth, lambdaab(T), is reported for thin films of the electron-doped superconductor Pr2-xCexCuO4-y at three doping levels (x = 0.13, 0.15 and 0.17). Measurements down to 0.35 K were carried out using a tunnel diode oscillator with excitation fields applied both perpendicular and parallel to the conducting planes. For all samples and both field orientations lambdaab(T) showed power law behavior implying a superconducting gap with nodes.
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