Observation of the nonlinear meissner effect in YBCO thin films:: Evidence for a d-wave order parameter in the bulk of the cuprate superconductors -: art. no. 197001
Observation of the nonlinear meissner effect in YBCO thin films:: Evidence for a d-wave order parameter in the bulk of the cuprate superconductors -: art. no. 197001
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DOI：
10.1103/physrevlett.93.197001
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发表时间：
2004-11-05
影响因子：
8.6
通讯作者：
Koren, G
中科院分区：
文献类型：
--
作者：
Oates, DE;Park, SH;Koren, G
本文通过测量高质量氧化钇钡铜外延薄膜在微波频率下的互调失真，为观察其非线性迈斯纳效应提供了实验证据。根据非线性迈斯纳效应的预测，大多数薄膜在低温下显示出非线性特性的增加。我们可以测量非线性迈斯纳效应，因为互调失真测量是一种非常敏感的方法，可以检测到10(5)中1分之一的穿透深度变化。
We present experimental evidence for the observation of the nonlinear Meissner effect in high-quality epitaxial yttrium barium copper oxide thin films by measuring their intermodulation distortion at microwave frequencies versus temperature. Most of the films measured show a characteristic increase in nonlinearity at low temperatures as predicted by the nonlinear Meissner effect. We could measure the nonlinear Meissner effect because intermodulation distortion measurements are an extremely sensitive method that can detect changes in the penetration depth of the order of 1 part in 10(5).