Temperature dependence of the in-plane penetration depth of ${YBa}_{2}$ ${Cu}_{3}$ $O_{6.95}$ and ${YBa}_{2}$ ( ${Cu}_{0.9985}$ ${Zn}_{0.0015}$ $)_{3}$ $O_{6.95}$ crystals from T to $T^{2}$

1 November 1993

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 48 (17), 13184-13187
https://doi.org/10.1103/physrevb.48.13184

Abstract

The low-temperature dependence of the microwave complex surface impedance (17 GHz) of pure and Zn-doped high-quality YBCO single crystals is reported. The surface resistance of the pure crystal shows a peaked structure around 40 K which disappears with Zn doping. The in-plane penetration depth varies linearly with temperature below 25 K; a

T^{2}

contribution appears at the lowest temperature when Zn impurities are added. This suggests that the former temperature dependence is intrinsic to pure crystals whereas the

T^{2}

behavior, also observed in thin films, would be due to defects. The linear temperature dependence is expected for superconducting gaps with lines of nodes.

Keywords

This publication has 11 references indexed in Scilit:

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Temperature dependence of the in-plane penetration depth of YBa2Cu3O6.95 and YBa2(Cu0.9985Zn0.0015)3O6.95 crystals from T to T2

Abstract

Keywords

Temperature dependence of the in-plane penetration depth of ${YBa}_{2}$ ${Cu}_{3}$ $O_{6.95}$ and ${YBa}_{2}$ ( ${Cu}_{0.9985}$ ${Zn}_{0.0015}$ $)_{3}$ $O_{6.95}$ crystals from T to $T^{2}$