Moler KA, Kirtley JR, Hinks DG, Li TW, Xu M. Images of interlayer josephson vortices in Tl2Ba2CuO6+delta.
Science 1998;
279:1193-6. [PMID:
9469806 DOI:
10.1126/science.279.5354.1193]
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Abstract
The strength of the interlayer Josephson tunneling in layered superconductors is an essential test of the interlayer tunneling model as a mechanism for superconductivity, as well as a useful phenomenological parameter. A scanning superconducting quantum interference device (SQUID) microscope was used to image interlayer Josephson vortices in Tl2Ba2CuO6+delta and to obtain a direct measure of the interlayer tunneling in a high-transition temperature superconductor with a single copper oxide plane per unit cell. The measured interlayer penetration depth, lambdac, is approximately 20 micrometers, about 20 times the penetration depth required by the interlayer tunneling model.
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