Abstract
The magnetic field dependent c-axis dissipation in Bi2Sr2CaCu2O8+y single crystals is shown to agree with that of a series stack of Josephson tunnel junctions. We extract the Josephson coupling energy Ej from the measured the c-axis resistance as a function of the angle θ between the c-axis and the magnetic field B using an extended Ambegaokar-Halperin model. For B > 0.5T, Ej increases continuously with both decreasing temperature and decreasing magnetic field. At T = 78K, Ej exhibits a B−0.5 behavior.
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Beschoten, B., Sadewasser, S., Winkeler, L. et al. Magnetic field dependence of the Josephson coupling energy along the c-axis in Bi2Sr2CaCu2O8+y . J Low Temp Phys 105, 1219–1224 (1996). https://doi.org/10.1007/BF00753866
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DOI: https://doi.org/10.1007/BF00753866