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Microwave Electrodynamics of Electron-Doped Cuprate Superconductors

J. David Kokales·Patrick Fournier·Lucia V. Mercaldo·Vladimir V. Talanov·Richard L. Greene·Steven M. Anlage
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Abstract

We report microwave cavity perturbation measurements of the temperature dependence of the penetration depth, lambda(T), and conductivity, sigma(T) of Pr_{2-x}Ce_{x}CuO_{4-delta} (PCCO) crystals, as well as parallel-plate resonator measurements of lambda(T) in PCCO thin films. Penetration depth measurements are also presented for a Nd_{2-x}Ce_{x}CuO_{4-delta} (NCCO) crystal. We find that delta-lambda(T) has a power-law behavior for T<T_c/3, and conclude that the electron-doped cuprate superconductors have nodes in the superconducting gap. Furthermore, using the surface impedance, we have derived the real part of the conductivity, sigma_1(T), below T_c and found a behavior similar to that observed in hole-doped cuprates.

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J. David Kokales, Patrick Fournier, Lucia V. Mercaldo, Vladimir V. Talanov, Richard L. Greene, Steven M. Anlage. 2000-07-28. Microwave Electrodynamics of Electron-Doped Cuprate Superconductors. https://doi.org/10.1103/physrevlett.85.3696

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